DWQA Questions › Category: Extraterrestrial Interlopers › What percent of cases of persistent asthma are viral in origin and would be helped by taking our Antiviral Regimen? 0 Vote Up Vote Down Nicola Staff asked 3 weeks ago This is more on the order of 95% as they are of a more severe nature in being more evident and intrusive. Please login or Register to submit your answer Username or Email Address Password Remember Me Connect with: