“Can a vaccinated person still spread the coronavirus? - Mint” plus 1 more Can a vaccinated person still spread the coronavirus? - Mint Posted: 24 Feb 2021 09:26 PM PST 1. Why is this important? While getting vaccinated gives people considerable insurance against falling ill with Covid, which is sometimes fatal, if they can still get silently infected with SARS-CoV-2, they might pass it on, potentially sickening people who aren't immune. Those who are infected but never develop symptoms are responsible for 24% of transmission, one study estimated. The more SARS-CoV-2 circulates, the more opportunity the virus has to mutate in ways that enhance its ability to spread, sicken and kill people, and evade the immunity provided by existing vaccines or a past infection. Already, variants of the virus have emerged that appear to be more dangerous. Also, using vaccination to achieve so-called herd immunity, when an entire community is pro...