All organisations with 10 or more employees or volunteers, who cannot work from home, can now access the workforce asymptomatic testing programme.
Previously this was open to organisations with more than 50 employees.
Minister Swann said, “Since the launch of the Northern Ireland asymptomatic testing programme there has been a great deal of interest from employers with 321 expressions of interest made.
“These have come from organisations and companies in the public, private and third sectors.
“This is a significant move in the testing programme as up to one-third of people who have coronavirus are asymptomatic.
“My Department is focusing on rapidly identifying these people to isolate and reduce transmission of the virus.