If I already recovered from Covid-19 infection, can I be sure I won’t get it again or pass it to others?

Biology/Immunity Infection and Spread

A: No. Evidence on the longevity and strength of the immune system response to SARS-CoV-2 remains inconclusive. Previous infection does not give you an “immunity passport”. All individuals should continue to follow SMART precautions, particularly during the holiday season. Here is what we know to date. Antibody testing alone is an insufficient measure of immunity.