The Food and Drug Administration (FDA) has granted Emergency Use Authorization (EUA) to the Pfizer-BioNTech vaccine, the Moderna vaccine, and the Johnson & Johnson vaccine. Additional vaccines are in Phase 3 of clinical trials and maybe submitting data for review with the FDA soon. 

To measure vaccine efficacy, or how well a vaccine works in a controlled clinical trial, the Food and Drug Administration (FDA) first looks at the number of people who fell ill with the disease. Then the agency compares whether they received the vaccine or the placebo (a…

Scientists have not yet figured out how much immunity (protection from an infectious disease) people have after recovering from a natural case of Covid-19, or how long natural protection lasts. Some early studies suggest that natural immunity may fade more quickly in certain people.

Side effects vary depending on the individual and the vaccine. Many people may have mild side effects.

At least for now, yes. Like other coronaviruses, the one that causes Covid-19 is primarily a respiratory virus, which affects the organs and tissues involved in breathing (like the lungs).

Yes. According to existing clinical trial data, authorized Covid-19 vaccines are shown to be safe and effective at preventing Covid-19 when recipients receive the two specified doses of each vaccine based on the timing used in the trials.

No, the Covid-19 vaccines will not make you sick with the virus. None of the Covid-19 vaccines authorized by the Food and Drug Administration (FDA) or currently under consideration for approval contain the live virus.