Updated on Feb 22, 2022

As the COVID-19 vaccines are introduced, many people have questions about development, safety, access, cost, and other common concerns. This page provides information about what scientists do and do not know yet about the vaccines, drawing from the World Health Organization, the United States Centers for Disease Control and Prevention, and other trusted sources. Some of this language is used word for word, and other language is paraphrased. We would like to acknowledge the hard work of these organizations in compiling this information.

Getting vaccinated is one of many steps you can take to protect yourself and others from COVID-19.  Other recommendations including the use of face masks, distancing and washing hands should continue to be followed to reduce your chance of being exposed to the virus or spreading it to others.

If you cannot find the information you are looking for on this page, you are invited to submit your own questions and our team will look into the answers.

Please follow the links below for more information: (U.S. Department of Health & Human Services)

World Health Organization

The United States Center for Disease Control and Prevention

New York Times COVID-19 Vaccine Resources

This material was curated by Viswanath Lab of Harvard Chan School of Public Health and the Dana-Farber Cancer Institute (DFCI) with the help of the Health Communication Core  of Dana-Farber/Harvard Cancer Center (DF/HCC). These are  not the official views of Harvard Chan  or DFCI. For any questions, comments or suggestions reach out to