The US Centers for Disease Control and Prevention (CDC) issued guidelines on the allergic reactions from the coronavirus vaccine doses and how people with histories of allergies should proceed with the vaccines. The CDC said that anyone who has had a severe reaction to the first dose of the coronavirus vaccine, should not get the second dose. It defined 'severe allergic reaction' as needing the medication epinephrine or treatment in a hospital.US CDC said it was monitoring reports of allergic reactions to the coronavirus vaccination. In another guideline, the US CDC said people who have had a severe allergic reaction to any ingredient in a coronavirus vaccine should avoid the vaccine formulation containing the ingredient.

The US Centers for Disease Control and Prevention (CDC) issued guidelines on the allergic reactions from the coronavirus vaccine doses and how people with histories of allergies should proceed with the vaccines. The CDC said that anyone who has had a severe reaction to the first dose of the coronavirus vaccine, should not get the second dose. It defined 'severe allergic reaction' as needing the medication epinephrine or treatment in a hospital.US CDC said it was monitoring reports of allergic reactions to the coronavirus vaccination. In another guideline, the US CDC said people who have had a severe allergic reaction to any ingredient in a coronavirus vaccine should avoid the vaccine formulation containing the ingredient.