H3N2 Flu Hits Delhi NCR | 69% Families Down With Fever: What You Must KnowH3N2 Flu Hits Delhi NCR | 69% Families Down With Fever: What You Must Know A new survey shows nearly 7 in 10 families in Delhi NCR are battling flu-like illness caused by H3N2, a fast-spreading influenza a strain. With symptoms that mimic the common cold but last longer and hit harder, doctors are issuing a warning. NDTV's Parmeshwar Bawa reports.