Allergic Reactions

Researchers identified fragrance additives that are most likely to cause either immediate or delayed allergic reactions, according to data published in the Journal of the American Academy of Dermatology.

Delayed hypersensitivity to vaccines is not uncommon but also does not typically contraindicate further vaccination, and patch testing can be used to determine the cause, according to a study published in Allergy & Asthma Proceedings.

An international team of researchers has developed hair dyes that may be less likely to cause the allergic reactions in users that can occur with traditional dyes, according to a study published in ACS Sustainable Chemistry & Engineering.

Researchers identified an association between a self-reported history of high-risk allergy and an increased risk for allergic reactions after receipt of an mRNA COVID-19 vaccine.

Although the CDC lists a severe or immediate allergic reaction to the first dose of an mRNA COVID-19 vaccine as a contraindication for the second dose, a study found most individuals with a dose one reaction received dose two safely.

A panel of experts at the virtual American Academy of Allergy, Asthma and Immunology Annual Meeting highlighted current evidence on allergic reactions to available COVID-19 vaccines and how to assess patients who have had a reaction.