Rockland health officials have confirmed six cases of whooping cough across the county and five more cases are under investigation, LOHUD reports.

The cases are spread out across the county, and there are fewer than in previous years when there were more than two-dozen cases, according to county spokesman John Lyon. There were 95 confirmed cases of measles as of Monday and another seven under investigation.

LOHUD points out that pertussis, or whooping cough, is a highly contagious respiratory tract infection caused by bacteria, according to the Centers for Disease Control and Prevention. It can affect anyone but is especially dangerous for babies under 12 months old. The most effective way to prevent whooping cough is through vaccination. The vaccine is often combined with diptheria and tetanus.