Why post-vaccine rashes could be a 'good thing' Marlene Cimons, The Washington Post April 11, 2021 FacebookTwitterEmail Kaiser Doctor Allison Friedenberg (left) receivies a Pfizer COVID-19 vaccine shot from Nurse Scott Keech at Kaiser San Francisco hospital on December 7, 2020 in San Francisco, California.Douglas Zimmerman / SFGATE Tina Burke, 40, a nurse who works on the oncology floor at Massachusetts General Hospital (MGH), received her first coronavirus shot on Jan. 3. Six days later, she developed a rash on her injected arm but "thought nothing of it." The next morning, however, she woke up and found her hands and the heels of her feet covered with itchy red bumps.