There have been ten detected cases of Covid-19 since mandatory hotel and quarantine testing began in the quarantine facilities on 26th March.
413 people have been swabbed to date.
Niamh O’Beirne, the HSE’s National lead for Covid-19 Testing and Tracing, said contact tracers have been asking additional questions to index cases, who were noted to have contracted the virus through community transmission.
She said when people were asked where they had been over the previous seven days “a high number” (over 55.8%) said they had been in supermarkets and petrol stations.
“In second place was workplace at about 15%, and then we have school, transport, travel and social gatherings outdoors,” she said.