To measure how well a vaccine works in a 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 harmless, inactive substance that looks identical to the…
People with certain underlying or pre-existing conditions, including cancer, diabetes, kidney disease, obesity, and heart disease, are more likely to experience severe complications from Covid-19 -- so they're strongly encouraged to get the vaccine. In clinical trials, the Covid-19 vaccines …
The Food and Drug Administration (FDA) has granted Emergency Use Authorization (EUA) to the Pfizer-BioNTech vaccine and the Moderna vaccine. Additional vaccines are in Phase 3 of clinical trials and maybe submitting data for review with the FDA soon.  Emergency Use Authorization exists to…
Patient safety is central to the research and development of a vaccine. Like all new medicines or treatments, vaccines must pass a rigorous set of tests before being approved by independent, scientific experts at the U.S. Food and Drug Administration. 
By readying the immune system for future health battles, vaccines protect individuals around the world from dangerous diseases. 
Pregnancy There isn't much data yet regarding the Covid-19 vaccines' impact on pregnant women. According to the Centers for Disease Control and Prevention, "experts believe that mRNA vaccines are unlikely to pose a risk to the pregnant person or the fetus because mRNA vaccines are not live…
Researchers are moving fast to develop vaccines to combat Covid-19. In the past, it would take years to bring a new vaccine through all the regulatory hurdles established by the Food and Drug Administration (FDA) and to approval.
The federal government has taken steps to deliver a future vaccine for Covid-19 at no cost to individuals and families during the pandemic. This is the way vaccines have been made available to the public in previous health emergencies.
With vaccine development moving so quickly, it’s easy to understand why some people are asking whether a vaccine for Covid-19 will be safe and effective. But it is important to remember the very strict scientific and regulatory process vaccine developers must follow to bring a new product to…