Questions and Answers about COVID-19 Vaccines from Children's Hospital of Philadelphia (CHOP)

This is an excellent site for answers about COVID-19 & Vaccines, reviewed by Paul A. Offit, MD on August 12, 2020 including:

What types of COVID-19 vaccines are being tested?

Which type of COVID-19 vaccine is most likely to work?

Is one of the COVID-19 vaccines expected be more effective for the elderly population? 

I have a health condition that prevents me from getting vaccines with live viruses. Do you know if the COVID-19 vaccine uses dead or live virus?

I heard that some COVID-19 vaccines are being made in fetal cells. Is this true?

How many doses of a COVID-19 vaccine will be needed? Will a booster dose be needed?

How long will vaccine immunity last?

If you had the virus and recovered will you still be able or need to get the vaccine?

Will a coronavirus vaccine need to be given annually?