Medicine All of the following are true regarding influenza except- A Point mutations in hemagglutinin gene cause antigenic drift B Acquisition of completely new hemagglutin in gene cause antigenic shift C Amantidine is active against influenza B only D Amantidine Shortnes the illness 💡 Explanation All of the following are true regarding influenza except- ✓ Correct Answer: C. Amantidine is active against influenza B only