New evidence from the Health Information and Quality Authority (HIQA) suggests that immunity against Covid-19 lasts nine months after infection.
The news, which HIQA described as having widespread positive implications, may imply that the number of people under the age of 50 who only require one vaccine dose will increase.
HIQA also stated that people who had Covid-19 in the last nine months should be exempt from serial testing and will automatically be entitled to a green certificate.
This follows a review of 19 large studies of reinfection from HIQA that involved over 640,000 people who were previously infected with the virus.
HIQA has now issued advice to the National Public Health Emergency Team (NPHET) that the duration of post-viral immunity should be extended from six months to nine months.
These findings are quite significant and relevant in relation to the virus situation in Ireland with Dr. Máirín Ryan, deputy HIQA CEO and Director of Health Technology Assessment, stating that two-thirds of the population who were infected with Covid-19, acquired the virus at the beginning of the year which means that if you were infected back in January then your immunity will last until September.