The ward boy, identified as Shrikant Mohite (34), entered the room where the victim was resting and molested her, but was caught by others at the centre after she raised an alarm.
The case was registered at Bazarpeth police station in Kalyan. He has been charged under section 354 (physical contact and advances involving unwelcome and explicit sexual overtures), he added.
According to reports, Mohite has confessed to the crime and is being questioned for other cases similar to the crime.
After registering the case, the police released a statement about the incident.
"In a shocking incident, a female Covid 19 positive patient had arrived at KDMC Kalyan Covid Centre to admit herself for treatment. Here, she alleges that a ward boy molested her while she awaited her treatment. After filing a complaint, an FIR has been registered and the accused have been arrested," the statement read.
It added that the victim informed her husband about the incident via telephone call and cried out for help following which the ward boy fled the scene, as quoted by ANI.
Meanwhile, a case has been registered against a BMC official at Mumbai's Shivaji Park Police Sation.