The world’s biggest COVID-19 vaccine study started on Monday. A total of 30,000 planned volunteers will help test the effectiveness and safety of a shot developed by the National Institutes of Health and drug maker Moderna. The volunteers will each receive two doses of a shot. They will not know whether they are getting the real vaccine or a false version. Scientists will then closely follow the volunteers as they go about their daily activities. They want to see which group experiences a higher rate of infections, especially in areas where the virus still is spreading unchecked. There is still no guarantee that the experimental vaccine will offer protection. The study hopes to answer that question.
The vaccine study volunteers will each receive two doses of the shot.
five pills
one dose of the shot
two doses of the shot
three doses of the shot
How many volunteers will be used to test the effectiveness and safety of the vaccine?
300
30,000
50,000
3,000
What is a vaccine study?
a clinical trial establishing the safety and efficacy of a vaccine prior to being licensed
a tutorial on how to inject a patient
a course in medical school
a book about a pandemic