Should those who have allergies get a COVID-19 vaccine? Doctors at the University of Kansas Health System video news conference discussed allergic reactions to the COVID-19 vaccine on Wednesday morning. According to Dr. Marissa Love, allergy specialist, for the most part, severe allergic reactions to the vaccine are pretty rare. About one in a million people have a severe allergic reaction to it. Anyone who has a severe allergic reaction to the first dose of the vaccine should be evaluated, ideally by an allergist, before getting the second dose, she said. COVID-19 patients who have already recovered should still take the vaccine, according to Dr. Love. Some develop a natural immunity after getting COVID-19, she added.