👉 Sigmavirus is a type of virus that causes respiratory illness, commonly known as chickenpox. It's caused by the herpes simplex virus, which belongs to the family of疱疹病毒,and it can spread through contact with an infected person's skin or mucous membranes. The virus can also cause other types of infections, such as varicella zoster (varicella) and Epstein-Barr virus diseases, depending on the specific strain.