How long do breakthrough covid-19 symptoms last? Experts examine average recovery timelines

“COVID-19 vaccines are doing exactly what they’re supposed to do — prevent severe illness, hospitalization, and death. What they don’t do is guarantee you won’t get infected at all,” says Bernadette Boden-Albala, MPH, DrPH, the director [and Founding Dean] of the public health program at the University of California, Irvine. “Breakthrough cases occur when COVID-19 variants evade the body’s immune response… but most breakthrough cases are asymptomatic or mild, due to the vaccinated person having built-up immunity against the virus.”