Updated COVID-19 case numbers for 15-26 May 2021

To ensure the continued surveillance and reporting of COVID-19 cases in the wake of the cyber-attack on the HSE's systems, an alternative approach to reporting daily COVID-19 case numbers was introduced on 15 May 2021.

Case numbers were reported based on the number of positive results reported from laboratories adjusted for any duplication. Further work was undertaken to develop a more robust process for daily case numbers and from 25 May 2021 daily case numbers are based on a data extract from the Covid Care Tracker.

The HSE Covid Care Tracker (CCT) is the IT system that records the data collected at telephone interviews with the COVID-19 cases and their close contacts. The number of cases is based on this improved process and relates to cases reported on the Covid Care Tracker over the same period of time.

The revised daily case numbers below are as a result of this further validation process. As soon as all COVID-19 surveillance systems are restored, COVID-19 cases for this period will be collated and validated on CIDR.