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Beautiful october down syndrome awareness month. If a vaccine candidate prompts a promising immune response in phase 2 clinical trials after passing safety tests in phase 1 its possible that the fda could approve such a vaccine for emergency. Usually takes years but covid 19 vaccines are moving through in record time. In phase 3 the vaccine.
Phase 3 trials usually involve thousands of people. Vaccines normally require years of testing and additional time to produce at scale but scientists are hoping to develop a coronavirus vaccine within 12 to 18 months. Approving a vaccine in the us.
The vaccine would be distributed in four phases with health care workers and vulnerable americans such as the elderly and those with underlying health conditions getting it first according to. Some coronavirus vaccines are now in phase 12 trials for example in which they are tested for the first time on. What does that mean.
During phase i small groups of people receive the trial vaccine. What are the 4 phases of vaccine clinical trials. In phase iii scientists are directly asking the question for the first time whether the vaccine protects people against sars cov2 and whether or not there are serious side effects not yet.
But if there was any time to fast track a vaccine it is now. There are ways to slash time off this process by combining several phases and testing vaccines on more people without as much waiting. In phase ii the clinical study is expanded and vaccine is given to people who have characteristics such as age and physical health similar to those for whom the new vaccine is intended.
By the time it reaches a phase 3 clinical trial a vaccine has already proven its effectiveness and its potential side effects among a few hundred people but its still important to learn whether those results can be considered reliable among the larger population.
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