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Can vaccinated people still spread COVID-19? How long does immunity last? Here’s what science knows now.

A Penn study is among many now underway to answer these questions. None of which is reason to hesitate in getting the vaccines, which are safe and remain our best hope of curbing the pandemic.

In a University of Pennsylvania lab, Sharon Adamski extracts plasma from blood collection tubes to study how well the vaccines work against COVID-19.
In a University of Pennsylvania lab, Sharon Adamski extracts plasma from blood collection tubes to study how well the vaccines work against COVID-19.Read morePenn Medicine
    by Tom Avril
    Published