A hospital consultant said people needed to "grow up" and take coronavirus seriously after footage was shared on social media showing supposed empty hospitals.
Dr David Nicholl, who works in the West Midlands, said he was fed up of people "wandering round empty hospitals".
Police are investigating after videos filmed in hospitals in Birmingham and Redditch were posted on social media.
"We are only going to get through this if we work together," Dr Nicholl said.
It follows a similar incident in Colchester, Essex, where security officers removed Covid-19 "deniers" who were taking pictures of empty corridors.
Dr Nicholl, a spokesman for the Doctors Association UK and a former Liberal Democrat parliamentary candidate, said: "We are extremely busy. It's important people treat this with the gravity they should, we must suppress the virus."
He added it made him "pig sick" when he saw people together protesting that coronavirus was a hoax.
"It is grossly offensive to the now over 70,000 people - including the 600 of my colleagues - who have died because of this illness," he said.
Ch Supt Phil Dolby, of West Midlands Police, tweeted to say his "blood was boiling" when he had seen the videos.
Blood BOILING!!! - Hospital video 'idiots' condemned by furious medics battling to save lives. COVID deniers should count themselves lucky there is such a thing as the Hippocratic Oath, still held to be sacred by our #NHSheroes despite such idiocy. https://t.co/DJKV0PxHrP— Ch Supt Phil Dolby (@PhilDolbyWMP) January 4, 2021
A West Midlands Police spokesman said the force had been contacted on 1 January by a member of the public at Birmingham's Queen Elizabeth Hospital concerned a man was "walking around inside a hospital without a mask and filming".
"We are liaising with colleagues in West Mercia Police and will consider the circumstances before deciding on the most appropriate course of action," the spokesman added.
Ch Insp Ed Hancox, of the West Mercia force, said no arrests had been made but the investigation continued.