Monkeys infected with Coronavirus
showed short-term Immunity when Reinfected
According to the results of a new study, monkeys infected with the SARS-CoV-2 virus, the virus responsible for the COVID-19 infection, were observed to show short-term immunity against the virus when they were reinfected with the same virus after a period of time.
In a Chinese study published in the journal Science, it was found that test monkeys that were infected with the COVID-19 causing virus, SARS-CoV-2, were protected from reinfection for up to 28 days later.
The monkeys were seen to display initial immunity, however, in order to know if the millions of people infected at the start of the pandemic are protected from re-infection, it will be necessary to wait months, or even years, as it is still not clear how long such immunity will last in humans.
To find out if the monkeys have a short-term immunity to the virus, Peking Union Medical College scientists performed an experiment on rhesus macaques, often used because of their similarities to humans. With a dose of the SARS-CoV-2 virus, six rhesus macaques were infected in their trachea in this study. It was observed that the monkeys took about two weeks to recover and developed mild to moderate symptoms.
The study authors wrote that, when four of the six monkeys received another dose of the virus after twenty-eight days after the first infection, they showed no sign of reinfection despite a brief rise in temperature.
The researchers took frequent samples and discovered that three days after the monkeys were infected, the peak viral load was reached. The scientists wrote in the study that the monkeys produced more so-called neutralizing antibodies that may have protected them against short-term reinfection and showed a stronger immune response after the first infection.
Monkeys infected with Coronavirus showed short-term Immunity when Reinfected