Microbiology True about diphtheria are all except: A Incubation period-2 to 5 days B Chemoprophylaxis is done with rifampicin C Previously immunized asymptomatic household contacts should receive booster dose D Child with diphtheria is given antitoxin 💡 Explanation True about diphtheria are all except: ✓ Correct Answer: B. Chemoprophylaxis is done with rifampicin