Covid-19 immunity lasts nine months after infection, Hiqa advises

Dr Ryan says that extending the period of presumptive immunity has "widespread positive implications" for Irish people.

The Health Information and Quality Authority (Hiqa) says the duration of presumptive Covid-19 immunity should be increased from six months to nine post-infection.

Hiqa made the recommendation to the National Public Health Emergency Team (Nphet) following a review of 19 large cohort studies of reinfection involving more than 640,000 previously infected people, as well as advice from the Covid-19 expert advisory group.