The COVID-19 positivity rate on Long Island is now above 5%, which is double what it was only a month ago.

Dr. Mangala Marasimhan of Northwell Health says there are a few explanations as to why Long Island’s infections are rising while New York City remains under a 3% positivity rate.

“The rates on Long Island, in terms of vaccinations, are not as good as they are in the city,” Marasimhan says. “We’re seeing a lot of unvaccinated pockets across Long Island.”

The doctor also says people¬†across Long Island also aren’t wearing masks much anymore in indoor settings.

According to the New York state Health Department, a little over 1,500 New Yorkers tested positive for COVID-19 on Tuesday.