US study, for over 90 days ‘shield’ of about 82% and almost 85% against symptomatic reinfection
Milan, March 26 (beraking latest news Health) – People recovered from Covid-19 could be immune from re-infection for at least 90 days, 3 months. The level of protection is 81.8%, and rises to 84.5% against symptomatic disease. This is demonstrated in ‘Clinical Infectious Diseases’ a study by the University of Cleveland, in the USA.
The research involved more than 150 thousand people tested for Covid with the PCR technique from 12 March to 30 August 2020. Those who tested positive were re-examined 90 days after the first diagnosis. “Previous Sars-CoV-2 coronavirus infection was” highly protective against reinfection and symptomatic disease. This protection has increased over time, suggesting that an ongoing viral spread or immune response may persist beyond 90 days and they may not represent a true reinfection. Since the vaccine supply is limited – the authors conclude – patients with a known history of Covid-19 could delay vaccination to allow the most vulnerable to access the vaccine and slow down infections “.
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