More than 8,000 people are waiting for Covid-19 tests in the midwest region, which covers Limerick, Clare and north Tipperary.
The Health Service Executive has set up 41 coronavirus testing locations across the country, two are located in Limerick city at the Child and Family Centre in Roxboro where there are three swabbing stations, and at St Gabriel's school in Dooradoyle in the city.
One is also located at the Derg Centre in Nenagh with two drive-thru stations and one at the Ennis driving centre where there are also two drive-thru swabbing stations.
An extra drive-thru will start today at the Gaelic Grounds in Limerick and an extra swabbing station at the Nenagh location.
Increased swabbing will start at St Gabriel's school next Friday.
All test centres will operate from 8am-8pm, seven days a week.
Once people have been tested they can expect to wait seven days for a result and are asked to self-isolate during that period.
The HSE Mid West community healthcare office said it has seen a significant increase in demand for testing and it regrets that a large number of people are awaiting testing and receipt of results.
There have been 1,329 cases of coronavirus confirmed in Ireland and seven people with Covid-19 have died.
Around 80% of cases of Covid-19 will be a mild to moderate illness, close to 14% have severe disease and around 6% are critical.
Generally, you need to be 15 minutes or more in the vicinity of an infected person, within 1-2 metres, to be considered at-risk or a close contact.
But there are higher risk settings, where transmission is possible in a shorter time interval, where health staff are dealing directly with known or suspected cases in particular settings and may need personal protective equipment.