CHICOPEE, Mass. (WWLP) – Doctors are warning of two new COVID-19 strains this summer that are currently going around.

According to WHO, globally, this variant contributed to 23 per cent of global COVID-19 cases as of last month.

A contagious new COVID-19 variant called NB.1.8.1, aka "Nimbus," is now dominant in the United States, CDC data show. What to know about symptoms and vaccines.

With a lingering risk for showers and thunderstorms in Massachusetts on Friday, over 20 beaches across the state were closed, mostly due to bacteria levels.

The main symptoms are fever, chills and body aches, with respiratory symptoms like cough, runny nose and shortness of breath.