Question: how long are coxsackie blisters contagious?
Answer: How long are coxsackieviruses contagious? Coxsackieviruses are most contagious during the first week of symptoms. However, viable virus microbes have been found in respiratory tracts for up to three weeks and then in feces up to eight weeks after initial infection, but during this time, the viruses are less contagious.