Single Pfizer dose boosts patients’ immune system

eAwaz Medicine

Jerusalem – A new study shows people previously infected with coronavirus responded very strongly to one dose of the Pfizer vaccine. According to researchers, the strong response to one dose of the vaccine among those previously infected regardless of the duration between infection and vaccination is good news. Researcher Michael Edelstein from the Bar-Ilan University, said: “This finding can help countries make informed decisions regarding vaccine policy — for instance, whether those previously infected should be vaccinated on priority and, if so, with how many doses. It also offers reassurance that not having detectable antibodies after being infected does not necessarily mean that protection following infection is lost.”
The study, is published in the journal Eurosurveillance, the research team included 514 participants. Seventeen of them were infected with Covid-19 anytime between one and ten months before receiving the first dose of the vaccine. Antibody levels of a specific cohort were measured prior to vaccination to determine vaccine response. The researchers emphasise their findings should be confirmed in a larger cohort before reaching definitive conclusions. The researchers are continuing to follow healthcare workers after their second dose to better understand how long the vaccine will protect against Covid-19 in different groups of people.