Hidradenitis suppurativa (HS) is a condition caused by an over-active immune system and many of the treatments influence the immune system. At the start of the COVID pandemic, many people were taking medicines, like injected shots, for HS, psoriasis or other conditions. In the beginning there weren’t a lot of studies showing the benefits and risks of the treatments. In a new study led by Dr. Rebecca Haberman of New York University and published April 2020 in the New England Journal of Medicine, a group of doctors studied whether people being treated for immune diseases had more severe COVID.