Firefighters in Littleton, Colo., move a patient on a gurney to an ambulance to take him to the hospital in May.

LITTLETON, COLORADO – MAY 5: Dawning complete personal protective equipment South Metro Fire Rescue firefighters Chris Herrington, left, Eric Szabo, center and John Cronin, right, move a patient on a gurney to an ambulance to transport him to the hospital on May 5, 2020 in Littleton, Colorado. The PPE gear can be difficult to put on quickly and it is hard for the firefighters to communicate with each other or with patients when talking through the masks. Above and beyond all the normal stresses of an everyday EMS or fire call, Covid-19 is adding additional stress for firefighters. Many worry that they might bring it back to the station and infect their crew, or take it home with them and infect their family and loved ones. Concerns run high that this respiratory illness could very well be a career altering or career ending sickness with long lasting symptoms that could cause such devastating things like diminished lung capacity and even death. Full PPE is used by all personnel at SMFR when they go on Covid-19 or suspected Covid-19 calls. Masks and gloves are required on all calls. (Photo by Helen H. Richardson/MediaNews Group/The Denver Post via Getty Images)