Whooping cough cases remain elevated as vaccination rates drop

As friends and family gather this holiday season, there’s a warning for new parents. The CDC says cases of pertussis, or whooping cough, remain elevated this year. An unvaccinated infant died from the illness in Kentucky this week, while other states across the country are also experiencing a surge of cases. Ali Rogin speaks with pediatric infectious disease specialist Dr. Lorne Walker for more.