Vaccines are first tested in people during phase 1 clinical trials. Phase 1 clinical trials assess the initial safety of the vaccine candidate and often ... ... <看更多>
「vaccine clinical trial phases」的推薦目錄：
vaccine clinical trial phases 在 Phases of clinical trials | NCIRS 的相關結果
A vaccine must go through several phases of clinical trials before it can be licensed. Before a vaccine enters clinical trials, it undergoes pre-clinical ... ... <看更多>
vaccine clinical trial phases 在 The Four Phases of Clinical Trials - Pfizer 的相關結果
What are the phases of a clinical trial? Explore the definitions of phase 1, 2, 3 and 4 clinical trials and learn how to find a trial that fits your needs. ... <看更多>
vaccine clinical trial phases 在 A Global Phase III Clinical Trial of Recombinant COVID- 19 ... 的相關結果
There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA ... ... <看更多>
vaccine clinical trial phases 在 A Phase 1/2/3 Study to Evaluate the Safety, Tolerability, and ... 的相關結果
A Phase 1/2/3 Study to Evaluate the Safety, Tolerability, and Immunogenicity of an RNA Vaccine Candidate Against COVID-19 in Healthy Children and Young Adults ... ... <看更多>
vaccine clinical trial phases 在 A Phase III Clinical Study of a SARS-CoV-2 Messenger ... 的相關結果
Individuals who have been vaccinated with any vaccine other than the investigational vaccine used in this clinical trial from 28 days prior to Dose 1 to 28 days ... ... <看更多>
vaccine clinical trial phases 在 Phase II / III Study of COVID-19 DNA Vaccine (AG0302 ... 的相關結果
Subjects who have participated in clinical trials of other unapproved drugs and received the investigational drug within 4 weeks before the start of this ... ... <看更多>
vaccine clinical trial phases 在 Phase I/II Study of COVID-19 DNA Vaccine (AG0302 ... 的相關結果
Subjects who have participated in clinical trials of other unapproved drugs and received the investigational drug within 4 weeks before the ... ... <看更多>
vaccine clinical trial phases 在 Clinical trial phases | GSK 的相關結果
The first time a new treatment or vaccine is tested in humans, it will usually be given to a small group of healthy volunteers. However in some cases – such as ... ... <看更多>
vaccine clinical trial phases 在 The 5 Stages of COVID-19 Vaccine Development: What You ... 的相關結果
Phase 1 and 2a clinical trials normally last several months to even a year before proceeding to Phase 2b or Phase 3 trials, in which the pool of ... ... <看更多>
vaccine clinical trial phases 在 Vaccine Development, Testing, and Regulation 的相關結果
Next Steps: Clinical Studies with Human Subjects. Phase I Vaccine Trials. This first attempt to assess the candidate vaccine in humans involves a small ... ... <看更多>
vaccine clinical trial phases 在 Vaccine trial - Wikipedia 的相關結果
A vaccine Phase I trial involves normal healthy subjects, each tested with either the candidate vaccine or a "control" treatment, typically a ... ... <看更多>
vaccine clinical trial phases 在 AZD1222 US Phase III trial met primary efficacy endpoint in ... 的相關結果
This analysis validates the AstraZeneca COVID-19 vaccine as a much-needed additional vaccination option, offering confidence that adults of all ... ... <看更多>
vaccine clinical trial phases 在 Clinical trials 的相關結果
clinical trial phases for malaria vaccines. Rationale for clinical trials. Phase 1. Phase 2. Phase 3. Licensure. Phase 4. Each phase focuses on some new and. ... <看更多>
vaccine clinical trial phases 在 How COVID-19 vaccines are tested and approved - Australian ... 的相關結果
Phase 1. Phase 1 clinical trials usually include a few dozen healthy adult volunteers. · Phase 2. Phase 2 clinical trials have hundreds of ... ... <看更多>
vaccine clinical trial phases 在 Phase 3 clinical trial of investigational vaccine for COVID-19 ... 的相關結果
A Phase 3 clinical trial designed to evaluate if an investigational vaccine can prevent symptomatic coronavirus disease 2019 (COVID-19) in ... ... <看更多>
vaccine clinical trial phases 在 THE COMPLEX JOURNEY OF A VACCINE - IFPMA 的相關結果
Regulatory requirements for clinical trials (both Chemistry, ... a pre-clinical phase, the clinical development phase (phases I to III) and the. ... <看更多>
vaccine clinical trial phases 在 Drugs and vaccines for COVID-19: Authorized clinical trials 的相關結果
Listed are the authorized clinical trials in Canada with vaccines, ... Authorized under the Clinical Trials Interim Order, A Phase 1/2 Clinical Trial to ... ... <看更多>
vaccine clinical trial phases 在 Moderna's Fully Enrolled Phase 3 COVE Study of mRNA-1273 的相關結果
mRNA-1273 Phase 3 Clinical Trial Sites ; Henry Ford Health System. Detroit, Michigan, 48202 ; Hope Clinic of The Emory Vaccine Center. Decatur, Georgia, 30030. ... <看更多>
vaccine clinical trial phases 在 Efficacy and Safety of the mRNA-1273 SARS-CoV-2 Vaccine 的相關結果
The mRNA-1273 vaccine is a lipid nanoparticle–e. ... This phase 3 randomized, observer-blinded, placebo-controlled trial was conducted at 99 ... ... <看更多>
vaccine clinical trial phases 在 Vaccine Development – 101 | FDA 的相關結果
The U.S. Food and Drug Administration (FDA) is the regulatory ... Testing the Vaccine in People ... Includes R&D, Pre-Clinical, Phase 1 ... ... <看更多>
vaccine clinical trial phases 在 The Price of Success—How to Evaluate COVID-19 Vaccines ... 的相關結果
Phase 3 trials of the 2 vaccines demonstrated efficacy at warp speed ... this vaccine but for many clinical trials going on [now] and in the ... ... <看更多>
vaccine clinical trial phases 在 Looking beyond COVID-19 vaccine phase 3 trials - Nature 的相關結果
After the recent announcement of COVID-19 vaccine efficacy in clinical trials by several manufacturers for protection against severe disease ... ... <看更多>
vaccine clinical trial phases 在 Vaccine Research & Development - Johns Hopkins ... 的相關結果
1-10 Years Phase I Clinical Trials to Assess Safety, Dosing, and Immune Responses. Phase I clinical trials are the first step in assessing vaccines in people. ... <看更多>
vaccine clinical trial phases 在 COVID-19: Vaccine clinical trials and testing - Ministry of Health 的相關結果
The Pfizer vaccine (Comirnaty) has been assessed in global studies across three phases. Phase one and two assessed the safety and immunogenicity (the immune ... ... <看更多>
vaccine clinical trial phases 在 COVID-19 Vaccines: The Clinical Trials and What We Know ... 的相關結果
Science can't be rushed · Phase 1 – During this phase clinical trials enroll healthy volunteers. · Phase 2 – During this phase a larger number of ... ... <看更多>
vaccine clinical trial phases 在 Episode #13 - COVID-19 - Vaccine trials - WHO | World Health ... 的相關結果
Phase I trials are the small trials that are the first time that a new vaccine is being evaluated in humans. These would be vaccines that have ... ... <看更多>
vaccine clinical trial phases 在 Safety and efficacy of the ChAdOx1 nCoV-19 ... - The Lancet 的相關結果
Safety and efficacy of the ChAdOx1 nCoV-19 vaccine (AZD1222) against ... Following initiation of a phase 1 clinical trial in the UK (COV001) ... ... <看更多>
vaccine clinical trial phases 在 SARS-CoV-2 vaccines in advanced clinical trials: Where do ... 的相關結果
There are three inactivated SARS-CoV-2 virus vaccine candidates which are being evaluated in Phase III trials and will be discussed below. 3.1.2. * Live ... ... <看更多>
vaccine clinical trial phases 在 International regulators align positions on phase 3 COVID-19 ... 的相關結果
Data needed from laboratory, animal and human studies to allow initiation of phase 3 clinical trials for a COVID-19 vaccine; and ... ... <看更多>
vaccine clinical trial phases 在 COVID Vaccine Testing and Approval - University of Maryland ... 的相關結果
These clinical trials, which have three phases, are tightly regulated by the Food and Drug Administration (FDA). In the case of the COVID-19 ... ... <看更多>
vaccine clinical trial phases 在 Overview of Clinical Trial phases - Vaccine Development 的相關結果
Overview of Clinical Trial phases · Phase I study – an initial safety trial to determine dosages, involving a small group of adult participants. · Phase II study ... ... <看更多>
vaccine clinical trial phases 在 What are the different phases of clinical trials for vaccines? 的相關結果
What are the different phases of clinical trials for vaccines? · Exploratory stage: This is the start of lab research to find something that can treat or prevent ... ... <看更多>
vaccine clinical trial phases 在 COVID-19 - County of Los Angeles Public Health 的相關結果
There are many different treatments and vaccines being tested today for coronavirus. • In what phase of clinical trials is the treatment or vaccine? Clinical ... ... <看更多>
vaccine clinical trial phases 在 Phase III Clinical Studies for Vaccine Evaluation 的相關結果
Design par excellence is a randomized, double-blind, controlled trial where one group of the study receives the candidate vaccine while the other group receives ... ... <看更多>
vaccine clinical trial phases 在 Phase 3 Clinical Trial for COVID-19 Recombinant Protein ... 的相關結果
A 10µg antigen formulation of the SARS-CoV-2 adjuvanted recombinant protein-based vaccine developed by Sanofi in combination with GSK's AS03 adjuvant is under ... ... <看更多>
vaccine clinical trial phases 在 Clinical trials - NHS 的相關結果
What happens in a clinical trial? Testing a new medicine. All clinical trials of new medicines go through a series of phases to test whether they're safe and ... ... <看更多>
vaccine clinical trial phases 在 What are the three phases of vaccine testing? - Health Desk 的相關結果
Sometimes medications that have already been approved by the U.S. Food and Drugs Administration in clinical trials will enter into a Phase IV trial. ... <看更多>
vaccine clinical trial phases 在 What are the phases of a vaccine trial? - Students 4 Best ... 的相關結果
Phase II Clinical Trial. Phase II clinical trials study the intervention in a larger group of people (several hundred), stratified by age, to ... ... <看更多>
vaccine clinical trial phases 在 What Do COVID-19 Vaccine Timelines Mean For Clinical ... 的相關結果
Traditional trial phases were collapsed for COVID-19. The slowest part of vaccine development isn't finding candidate treatments but testing ... ... <看更多>
vaccine clinical trial phases 在 Here's what it takes to test a COVID-19 vaccine with clinical trials 的相關結果
Several pharmaceutical companies began testing COVID-19 vaccines as ... The clinical trial process is divided into three phases before a ... ... <看更多>
vaccine clinical trial phases 在 Everything you need to know about clinical trial phases 的相關結果
Due to COVID-19 vaccine and treatment developments, clinical trials have been in the limelight lately. Before reaching patients, every ... ... <看更多>
vaccine clinical trial phases 在 Inside the Pfizer/BioNTech COVID-19 vaccine trial 的相關結果
Clinical trials for the Pfizer/BioNTech vaccine began in May 2020: ... Here, the Phase 1/2 studies in Germany and the US - designed to ... ... <看更多>
vaccine clinical trial phases 在 Valneva Initiates Phase 3 Clinical Trial for its Inactivated ... 的相關結果
The Phase 3 trial “Cov-Compare”, (VLA2001-301), will compare Valneva's SARS-CoV-2 vaccine candidate, VLA2001, against AstraZeneca's ... ... <看更多>
vaccine clinical trial phases 在 How Do Vaccine Trials Work? | UPMC in Ireland 的相關結果
Vaccine Clinical Trials in Humans · Phase one: The first phase of the trial includes between 20 and 100 healthy adult volunteers who are at low risk for vaccine- ... ... <看更多>
vaccine clinical trial phases 在 The latest on COVID-19 vaccine clinical trials - Scandinavian ... 的相關結果
Check out the status of some of the high-profile Phase III clinical trials that are underway: AstraZeneca (UK/Sweden) & University of Oxford (Adenovirus vaccine ... ... <看更多>
vaccine clinical trial phases 在 Phase II/III Trial Explained | COVID-19 的相關結果
The Oxford Vaccine Centre COVID-19 Phase II/III Clinical Trial Explained. What is the purpose of this research study? The purpose of this study is to test a ... ... <看更多>
vaccine clinical trial phases 在 The performance of COVID-19 vaccines in clinical trials and in ... 的相關結果
COVID-19 vaccine roll-out started in the UK on 8 December 2020. Results from Phase 3 clinical trials have been published for all the ... ... <看更多>
vaccine clinical trial phases 在 Explainer: How clinical trials test COVID-19 vaccines - The ... 的相關結果
But what is a Phase 3 clinical study? And how does scientific testing provide us with reliable evidence that vaccines not only work but are ... ... <看更多>
vaccine clinical trial phases 在 Fact check: It is standard practice for vaccine safety monitoring ... 的相關結果
“COVID-19 vaccine trials are ongoing. ... After clearing final Phase III clinical trials, the Pfizer-BioNTech vaccine was granted approval ... ... <看更多>
vaccine clinical trial phases 在 Human trial for coronavirus vaccine launched by Moderna ... 的相關結果
ABC News was at Meridian Clinical Research in Rockville, Maryland, for the first day of Moderna's Phase 3 trial. One participant, a man in ... ... <看更多>
vaccine clinical trial phases 在 First in Human: Covid-19 Vaccines & Tales of Phase 1 Clinical ... 的相關結果
A phase 1 clinical trial is a small, first-in-human test of a drug or device, testing safety and response in carefully selected people who are ... ... <看更多>
vaccine clinical trial phases 在 CureVac Provides Update on Phase 2b/3 Trial of First ... 的相關結果
CureVac N.V. (Nasdaq: CVAC), a clinical-stage biopharmaceutical company ... Update on Phase 2b/3 Trial of First-Generation COVID-19 Vaccine ... ... <看更多>
vaccine clinical trial phases 在 How vaccines are tested, licensed and monitored 的相關結果
Phase II trials check that the vaccine works consistently, and look ... EU Clinical Trials Directive - enshrined in UK law by the Medicines ... ... <看更多>
vaccine clinical trial phases 在 COVID-19 Vaccine Trials: 9 Things You Should Know 的相關結果
There are several stages to vaccine development, such as the exploratory, pre-clinical, clinical, review and approval, manufacturing and quality ... ... <看更多>
vaccine clinical trial phases 在 How Clinical Trials Work | Pfizer 的相關結果
We first test a study vaccine or study medicine with a small group of clinical trial ... How study medicines progress through clinical trial phases ... ... <看更多>
vaccine clinical trial phases 在 Racial Diversity within COVID-19 Vaccine Clinical Trials - KFF 的相關結果
Diversity within clinical trials for a COVID-19 vaccine helps ensure ... Pfizer results provided for Phase 2/3 trial, Moderna results for ... ... <看更多>
vaccine clinical trial phases 在 13 COVID-19 Vaccines Are in Human Clinical Trials 的相關結果
The Phase I/II trial enrolled >1000 healthy volunteers and aimed to test the safety and immune response triggered by the candidate. The vaccine ... ... <看更多>
vaccine clinical trial phases 在 As the UK rolls out Pfizer's COVID-19 vaccine, the next ... - ABC 的相關結果
These are known as phase 4 studies, or "post-marketing surveillance". "What that means is once a vaccine has gone through all the clinical trial ... ... <看更多>
vaccine clinical trial phases 在 Challenges and opportunities in setting up a phase III vaccine ... 的相關結果
In this paper, we describe the experience and lessons learned of building clinical trial site capacity in terms of ... ... <看更多>
vaccine clinical trial phases 在 China begins Phase I trial of Covid-19 vaccine 的相關結果
China has commenced a Phase I clinical trial of a vaccine against Covid-19, the infection caused by the novel coronavirus. ... <看更多>
vaccine clinical trial phases 在 COVID-19 Vaccine: Latest Updates | Coronavirus Guidelines 的相關結果
A number of vaccines under investigation in Phase 3 trials (Table 2), clinical trials (Table 3), and 173 in preclinical evaluation. ... <看更多>
vaccine clinical trial phases 在 Clinical Trial Phases: What Happens in Phase 0, I, II, III, and IV 的相關結果
If the preclinical research is promising, they move forward with a clinical trial to see how well it works in humans. Clinical trials happen in several phases ... ... <看更多>
vaccine clinical trial phases 在 COVID-19 Vaccine Trials in Kids: Where Do They Stand? 的相關結果
What Are the Phases of a Clinical Trial? The clinical development of a vaccine is a three-phase process, according to the Centers for Disease ... ... <看更多>
vaccine clinical trial phases 在 Kaiser Permanente launches first coronavirus vaccine trial 的相關結果
Jennifer Haller, a clinical trial volunteer, receives the first-ever ... Phase I trials don't study the effectiveness of the vaccine in ... ... <看更多>
vaccine clinical trial phases 在 Clinical Research - Bharat Biotech 的相關結果
Being the first stage at which the vaccine is first tested on humans, this phase is extremely crucial. All our clinical trials are built on the rigorous ... ... <看更多>
vaccine clinical trial phases 在 University of Chicago Medicine begins recruiting participants ... 的相關結果
The University of Chicago Medicine will be a testing site for the Janssen ... for phase 3 COVID-19 investigational vaccine clinical trial. ... <看更多>
vaccine clinical trial phases 在 Vaccine Development against COVID-19: Study from Pre ... 的相關結果
Anticipating the accomplishment of phase III clinical trials, Pfizer and BioNTech decided to manufacture around 100 million dosages before 2020 ... ... <看更多>
vaccine clinical trial phases 在 Moderna coronavirus vaccine: First Phase 3 clinical trial in the ... 的相關結果
Savannah, Georgia (CNN) The first Phase 3 clinical trial of a coronavirus vaccine in the United States began Monday. ... <看更多>
vaccine clinical trial phases 在 AstraZeneca Phase I/II Covid-19 vaccine trial unlikely to show ... 的相關結果
Phase I/II of the AstraZeneca trial requires 30 Covid-19 cases to detect ... Any data from the Phase I / II would lack clinical significance ... ... <看更多>
vaccine clinical trial phases 在 AstraZeneca's COVID-19 vaccine enters phase 2/3 clinical trial 的相關結果
Once the vaccine moves into phase 3, the researchers will limit enrollment to people age 18 years and older. Adult participants in the phase 2 and 3 trials will ... ... <看更多>
vaccine clinical trial phases 在 National Clinical Trial Launches, Will Test Promising Vaccine 的相關結果
The Moderna vaccine trial is one of four Phase III vaccine efficacy trials expected to be opened in 2020 by the CoVPN, a consortium of ... ... <看更多>
vaccine clinical trial phases 在 COVID Clinical Trials: Antibodies, Immunity, and Vaccine ... 的相關結果
During Phase 3 of a clinical trial, researchers work with between 300 and ... a site for Stage III clinical trials for a COVID-19 vaccine. ... <看更多>
vaccine clinical trial phases 在 The importance of Phase 3 trials for a coronavirus vaccine 的相關結果
There are currently 34 vaccine candidates in various clinical trial phases, including one in Canada, according to the World Health ... ... <看更多>
vaccine clinical trial phases 在 Can vaccine clinical trials be sped up safely for COVID-19? 的相關結果
Phase 3 clinical trial – much larger groups, sometimes across different countries, receive the vaccine or a control, such as a placebo or ... ... <看更多>
vaccine clinical trial phases 在 City of Hope Opens Clinical Trial for Coronavirus Vaccine 的相關結果
City of Hope has initiated a phase 1 clinical trial that will test one of its investigational SARS-CoV-2 vaccines in healthy volunteers from ... ... <看更多>
vaccine clinical trial phases 在 What is the Difference Between Phase 3 and 4 Clinical Trials? 的相關結果
Following FDA approval, a treatment goes through Phase 4. This phase involves the largest group of participants. It can last for several years ... ... <看更多>
vaccine clinical trial phases 在 Phases of Clinical Trials | Cancer.Net 的相關結果
Clinical trial phases are numbered I, II, III, and IV (1, 2, 3, and 4). Cancer stages are 0, I, II, III, and IV (0, 1, 2, 3, and 4). But the numbers describe ... ... <看更多>
vaccine clinical trial phases 在 Coronavirus vaccine trials: what's the progress with future ... 的相關結果
This is known as 'phase 4' of clinical research, or post-marketing surveillance, ... ... <看更多>
vaccine clinical trial phases 在 What a Successful Vaccine Trial Looks Like - The Atlantic 的相關結果
Clinical trials usually follow three phases, with the first two focused on questions of safety and dosing. By Phase 3, a vaccine should ... ... <看更多>
vaccine clinical trial phases 在 Analyzing Phase 3 COVID-19 Vaccine Trials - University of ... 的相關結果
A scientist prepares a dose of a vaccine in an injection needle for a clinical trial ... On June 15, the University of Illinois at Chicago (UIC) ... ... <看更多>
vaccine clinical trial phases 在 What is a Phase 4 Clinical Trial? - News Medical 的相關結果
A phase 4 clinical trial begins after a drug has been approved for use in the general population following phase 1, 2 and 3 trials to ... ... <看更多>
vaccine clinical trial phases 在 Feature Article — COVID-19 Vaccines: Clinical Trials in Children 的相關結果
As a result, interest in the ongoing vaccine clinical trials in children has ... chose to include in their original phase 3 clinical trials. ... <看更多>
vaccine clinical trial phases 在 Stanford Medicine joins COVID-19 vaccine trials for children ... 的相關結果
Stanford is serving as a site of the Phase 2-3 trial to determine ... Drug Administration on May 10 authorized use of the vaccine for 12- to ... ... <看更多>
vaccine clinical trial phases 在 Definition of phase IV clinical trial - NCI Dictionary of Cancer ... 的相關結果
A type of clinical trial that studies the side effects caused over time by a new treatment after it has been approved and is on the market. These trials look ... ... <看更多>
vaccine clinical trial phases 在 Portman Announces Participation in COVID-19 Phase 3 ... 的相關結果
The clinical trials being conducted around the country are critical to verifying the safety and effectiveness of these vaccines and making them ... ... <看更多>
vaccine clinical trial phases 在 Vaccines & Immunity - IDSA 的相關結果
As vaccine candidates for COVID-19 continue development, refer here for updates on research and trials. This collection includes preliminary information on ... ... <看更多>
vaccine clinical trial phases 在 Traditional Vaccine Development Timeline - GOV.UK 的相關結果
Clinical Trials. Phase. II. Immune response. Phase. III. Protection against disease. Several years. Traditional Vaccine Development Timeline. ... <看更多>
vaccine clinical trial phases 在 How Long Will a Vaccine Really Take? - The New York Times 的相關結果
2020 2025 2030 2035 Today Academic research Pre-clinical Phase 1 trials Phase 2 Phase 3 Building factories Manufacturing Approval ... ... <看更多>
vaccine clinical trial phases 在 Phase 3 clinical trial of COVID-19 vaccine underway 的相關結果
A. A Phase 3 trial is really the last phase in the development of a vaccine before it goes through licensure. It is designed to measure efficacy ... ... <看更多>
vaccine clinical trial phases 在 Phases of clinical trials 的相關結果
Phases of clinical trials · Phase I Clinical Trial · Phase II Clinical Trial · Phase III Clinical Trial · Phase IV Clinical Trial · Other Clinical ... ... <看更多>
vaccine clinical trial phases 在 Double-Blind, Randomized, Placebo-Controlled Phase III ... 的相關結果
The adsorbed vaccine COVID-19 (inactivated) produced by Sinovac ... Double-Blind, Randomized, Placebo-Controlled Phase III Clinical Trial to ... ... <看更多>
vaccine clinical trial phases 在 How to expedite early‐phase SARS‐CoV‐2 vaccine trials in ... 的相關結果
Several vaccine candidates are currently in development for COVID-19, either in the preclinical or early clinical phase. ... <看更多>
vaccine clinical trial phases 在 Here's what you need to know about clinical trials as drug ... 的相關結果
Phase 1 clinical trial: These are small studies designed to evaluate the safety and efficacy of a drug or vaccine in healthy adults. ... <看更多>
vaccine clinical trial phases 在 The Hindu Explains | Why is Phase-3 of COVID-19 vaccine ... 的相關結果
In the normal course, those undergoing the trial must report results to the drug regulator which gives the go-ahead for the next stage of trials ... ... <看更多>
vaccine clinical trial phases 在 How to Participate in a COVID-19 Vaccine Clinical Trial - UNC ... 的相關結果
A phase III clinical trial for the vaccine produced by Moderna is seeking 30000 participants across the country. ... <看更多>
vaccine clinical trial phases 在 Vaccine Testing and Approval Process | CDC 的相關結果
Clinical development is a three-phase process. During Phase I, small groups of people receive the trial vaccine. In Phase II, the clinical study is expanded ... ... <看更多>