An agency-led study Public Health England (PHE) of the United Kingdom concluded that the majority of people who manage to overcome the coronavirus have an average of 83 percent immunity against the disease for at least five months, but can become infected again and transmit the virus to others.
To conduct the study, the researchers convened 21 thousand health workers of British hospitals to which divided into two groups: those who had had coronavirus and those who had not. Between June and November 2020, the members of both groups underwent biweekly PCR tests and a monthly test to analyze their level of antibodies.
According to the results, of the 6,614 health workers who had antibodies, only 44 developed a “potential” infection. The study concluded that the infection provides 94 percent protection against symptomatic reinfection and 75 percent immunity against asymptomatic reinfection.
Experts point out that the reinfection cases detected in the investigation, led by Susan Hopkins, are considered “potential” pending a genetic analysis that certifies the information.
Researchers from the PHE -an entity that depends on the Ministry of Health of the United Kingdom- indicated that study results cannot yet be extrapolated to other age groups since the study participants were between 35 and 54 years old and therefore probably more robust immune systems than, say, older adults.
The investigation will be extended for another twelve months to specify the duration of immunity, analyze the impact of new variant of coronavirus detected in the UK and monitor the protection of participants who have already received the vaccine.
In the United Kingdom, one of the countries hardest hit by the pandemic, the vaccination started in early December 2020 with the vaccine developed by the American laboratory Pfizer and already began using the drug developed jointly by AstraZeneca and the University of Oxford.