Covid Breakthrough Symptoms Duration. For patients with severe illness, duration of isolation for up to 20 days after symptom onset may be warranted. That being said, some people believe we are making vaccinated people with mild breakthrough infections isolate for too long.
Cough headache sore throat muscle aches and pains fever In the case of breakthrough infections, shortness of breath or difficulty breathing. For those who do feel sick, the symptoms are usually mild and last a few days to one or two weeks.