The World Health Organization has come up with a revelation that confirms the possibility of a second infection in people who have already recovered from Coronavirus once.
“At this point in the pandemic, there is not enough evidence about the effectiveness of antibody-mediated immunity to guarantee the accuracy of an ‘immunity passport’ or risk-free certificate,” the WHO stated on Friday. “People who assume that they are immune to a second infection because they have received a positive test result may ignore public health advice. The use of such certificates may therefore increase the risks of continued transmission.”
The warning has come following the plans of some nations of reopening the society, which completely based on the theory that the ones who have already tested positive and have been recovered are no more susceptible to the second infection. The UN agency wrote on its official website that some governments believe that the detection of antibodies to the infection will act as the “immunity passport” or “risk-free certificate” for the individuals who travel for work as they will not be re-infected.
“There is currently no evidence that people who have recovered from COVID-19 and have antibodies are protected from a second infection,” WHO wrote in the statement, clearing all doubts.
The organization is still reviewing the antibody responses to SAS-CoV-2, the virus causing COVID-19 infection. In most of the studies, it has been observed that people who have recovered from the infected state definitely have antibodies to the virus to fight against the re-infection, but the intensity may not be the same. There are some of them with considerably low levels of neutralizing antibodies in the blood, which indicate that the immunity of the cells may not be enough for recovery.
Meanwhile, the Infectious Diseases Society of America, in its briefing, stated that there is not enough information about antibody testing to track immunity. IDSA spokesperson Dr. Mary Hayden said that in a situation where there is not much information, it is better to assume that the risk of re-infection could be there.
“We don’t know even if the antibodies are protective, what degree of protection they provide, so it could be complete, it could be partial, or how long the antibodies last,” she said. Further, she also added that it cannot be denied that antibody responses “wane over time.”