Clusters of coronavirus cases have occurred at two Greater Manchester fire stations.
In total eight firefighters have tested positive at Blackley and Whitefield stations.
Testing was brought in for the region's firefighters in mid April after 50 were self isolating due to the COVID-19 pandemic.
As many as 62 had been in isolation before the Easter weekend.
In a bid to get more frontline crews back to work, those in self isolation are being sent to a testing station at Manchester Airport.
The move came after the Fire Brigades Union said revealed that nearly 3,000 fire and rescue staff across the UK were in isolation.
A spokesperson for Greater Manchester Fire and Rescue Service (GMFRS) said: “GMFRS has recently seen five firefighters on the same Watch at Whitefield Fire Station test positive for COVID-19. All five are now self-isolating at home.
“We have also seen a similar situation at Blackley Fire Station where three members of a Watch tested positive, but we expect two of them to return to work shortly now they are feeling better and have completed their period of self-isolation.
“The health, safety and wellbeing of all our colleagues is paramount. We are following guidance from the World Health Organisation (WHO) and Public Health England (PHE) and are continuing to do everything we can to limit the impact of COVID-19.
"This includes having a thorough cleaning regime at all our stations and we continue to carry out cleaning of common touch points (door handles, etc.) at each change of Watch.
“As a result of the contingency plans we have in place, we have been able to manage our sickness and have not seen a significant impact on our emergency response capability.”
Firefighters in Greater Manchester are driving ambulances, delivering food and medicines and having to collect bodies during the coronavirus outbreak.
The move was agreed in March at national level by the Fire Brigades Union, fire chiefs, and fire and rescue service employers.
It will initially be in place for two months, then reviewed.
Locally the union also agreed to lift a ban on overtime, which had been in place since October after six engines were axed from the region's fleet of 56 due to budget cuts.
