HIQA advise NPHET to extend the period of presumptive immunity from six to nine months post-infection

The Health Information and Quality Authority (HIQA) has today published its advice to the National Public Health Emergency Team (NPHET) on the duration of immunity (and protection from reinfection) following SARS-CoV-2 infection.

This advice was informed by a review of international evidence including 19 large cohort studies of reinfection involving over 640,000 previously infected individuals. It was also informed by 13 studies on immune memory response along with expert opinion, from the COVID-19 Expert Advisory Group.