Kassav co-founder Jacob Desvarieux has been placed in a medically induced coma at the Pointe-Pitre Hospital in Guadeloupe as he battles with COVID-19.
A Facebook post from the band said the legendary singer was immersed in an artificial coma to give him the necessary care.
The band said his condition is deemed stable by his doctors.
Desvarieux was said to have tested positive for COVID-19 last week.
A heavy metal rock guitarist living in Paris, Desvarieux formed Kassav with musicians George and Pierre-Eduard Decimus of the Kadans fusion band, the Vikings of Guadeloupe.
The group used the influence of well-known Dominican, Haitian and Guadeloupean bands to create a Guadeloupean carnival sound known as Zouk.
In 1980, the band, whose name is French for Cassava, launched its first album Love and Ka Dance and toured widely through Paris.
Kassav celebrated its 40th anniversary in 2019.
Desvarieux is 65.