Mountain View, CA

There's been very little in the way of good news since the beginning of the COVID-19 pandemic, but the release of highly effective vaccines has provided some hope that there is light at the end of the tunnel. Unfortunately, no vaccine is perfect. Whether it's waning effectiveness over time, the emergence of a new variant, or simply a person's unique response to the shots, even people who have received all of their doses can still catch the virus in rare instances known as breakthrough infections. But the symptoms that are most common among fully vaccinated people who contract COVID-19 can be a bit different from those seen in unvaccinated patients, as one recent study highlights.