While most sexually transmitted infections are transmitted through blood, vaginal secretions and semen, there are some that can also be contracted via contact with saliva and the mucous membranes in the mouth.

Perhaps you’ve heard that eating this or using that will magically prevent you from catching COVID-19. Find out how your immune system protects you against invaders – as well as what you can do to help fight the coronavirus.

I heard someone say that if you get the vaccine, you could still be a carrier and spread the virus even if you didn't notice you were sick. Is that true or just a rumor they picked up?

Question: If I’m having unprotected sex, but I have a mask on, will it protect me from COVID-19 if my partner has it?

I have read that it is important that a large percentage of people get the vaccine. It is not clear to me why.

Los Centros para el Control y la Prevención de Enfermedades (CDC) de EE. UU. Han actualizado las pautas de enmascaramiento desde que se redactó este documento. Obtenga la información más reciente.

We have received many questions about the risk levels associated with various activities. To help you decide, we put together an infographic ranking the risk level of common activities, and outlined some steps you can take to recognize if you’re in a risky COVID-19 situation.