She says close contacts of a case may not realise they need to be swabbed twice.
It's believed miscommunication is the reason why so many people are not turning up for their covid-19 test.
Up to 1,000 people are missing their scheduled test every day.
Anyone who may be infected is asked to present for two swabs on "day zero" and "day seven" - as the incubation period of the virus is 14 days.
Director of Public Health Medicine Midlands, Dr. Una Fallon, says that regime may be causing confusion and could be communicated better:
Two People Killed In Fatal Offaly Workplace Accident
"Handcuffed" Westmeath Man Steps Down As ICSA President
Search Continues For Missing Westmeath Man At Midlands Lake
FAI To Review Video Evidence Of Alleged Racist Chants Towards Adam Idah
Two People Hospitalised After Crash In Midlands
Enterprise Minister Signals Delay To Major Business Tax Measures
Laois Sees One Of The Country’s Fastest Rises In House Prices
Psychology Waiting Lists Reach 35,000 Nationwide