With most COVID-19 vaccines, you will need two shots in order for them to work, and it takes time for
your body to build protection after any vaccination. COVID-19 vaccines that require two shots may not
protect you until a week or two after your second shot.
No vaccine is 100% effective, and we don’t fully understand whether these vaccines will keep you from
transmitting the virus even if you are protected. Continue to use all the tools available to help stop
this pandemic: Cover your mouth and nose with a mask, stay at least six feet from others, avoid crowds and
wash your hands often.