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Discharged COVID19 Patients With Low Antibody Could Get Infected Again – WHO


"If a person has antibody levels too low, they can still get COVID-19 again."

Said Dr. Maria van Kerkhove, WHO infectious disease specialist.

In Korea to date, 140 cases of SARS-CoV-2 have been reported positive after being declared cured.
According to health experts, when infected with a virus, the body will produce antibodies to create immunity to help patients difficult to get the disease again. However, recent studies of COVID-19 cases show that this is not entirely true for the new strain of corona virus.

Dr Maria van Kerkhove, WHO's infectious disease expert, said:

“So far, we have not found any evidence that the use of serological tests can confirm whether an individual has the immune response will not be re-infected with COVID-19.”

In Shanghai (China), some patients with COVID-19 recover from antibodies but still cannot measure antibodies, while others have very high antibody levels.

"If a person has very low antibody levels, they can still get the SARS-CoV-2 virus again."

Dr. Maria warned.

WHO said the agency is urgently gathering more evidence to serve the analysis. Dr Mike Ryan, head of the WHO's emergency response department, said it was not clear whether the cases would be positive again due to reactivation of the virus in the body or in patients infected with the new virus.

It has not been determined after COVID-19 infection, for how long it develops antibodies, how long does this antibody last?
The United States and several European countries are currently conducting extensive tests with cases of COVID-19 infection to check whether patients have attained immunity to the SARS-CoV-2 virus. This is important before these countries decide to lift social distance measures.

Therefore, the risk of re-infected patients with SARS-CoV-2 is still very high if the countries loosen the measures to socialize too quickly.

According to Tedros Adhanom Ghebreyesus, WHO Director-General, the COVID-19 epidemic has increased rapidly but decelerated much slower, so the control measures need to be removed slowly.


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