A hospital worker monitors a person with COVID-19 in South Africa, where a new variant of SARS-CoV-2 has been identified.Credit: Rodger Bosch/AFP/Getty |
Preliminary reports from South Africa show people who have recovered from Covid-19 have been reinfected with a new, more contagious variant of the virus, World Health Organization officials said at a press briefing Friday.
The good news, however, is that the vaccines developed to
guard against the virus appear to reduce the severity of illness in those who
do develop Covid-19, even if it doesn’t completely protect them from infection,
said the WHO’s chief scientist, Dr. Soumya Swaminathan.
“The [vaccine] trials that have been done so far in South
Africa as well as in Brazil with different candidates have shown complete
protection against severe disease and hospitalization and death. There hasn’t
been a single case reported in any of the trials,” she said.
Vaccination may also decrease the spread of new Covid
variants, according to the WHO.
“There are reports now that if you have the vaccine and you
get infected, the viral load is much lower. So the chances of infecting others
may be lower,” said Swaminathan.
Prior Covid infection produces antibodies and cell mediated
immunity that are thought to prevent reinfection, scientists have found. Vaccination
also helps individuals build protection against the virus.
But researchers continue to study the extent to which prior
infection and vaccination protect against the new, more infectious variants of
the coronavirus.
Increased vaccination efforts alone are likely insufficient
in managing the spread of the coronavirus strain originating in the U.K., Dr.
Scott Gottlieb, former commissioner of the Food and Drug Administration, told
CNBC on Thursday. Gottlieb said a combination of incoming warmer weather and
ramped up vaccinations could help contain the variant.
Swaminathan at the WHO briefing Friday stressed the importance of vaccinated people continuing to take precautions such as mask wearing, hand washing and social distancing to control the spread of the virus.
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