Japan Yokohama City University Professor Yamanaka Takaharu and other people’s research team 20 summary of the results of the study showed that even if infected with the original strain of the new coronavirus, the proportion of people with immunity to the mutated strain after six months to a year will also be reduced. Especially among asymptomatic and mildly ill patients, the likelihood of not being able to prevent reinfection or illness is higher, and the team believes that vaccination is needed even if one has been infected.
According to an exclusive report by Kyodo News today, the study shows that mildly ill patients may be re-infected with a mutated strain of the virus. A research team led by Yokohama City University professor Haru Yamanaka and others used a self-developed system to determine whether the blood of about 250 people who had recovered from infection with New Crown contained “neutralizing antibodies” that were immune to four mutated strains of the virus found in Japan, including the British and Indian strains, six months and a year later.
Neutralizing antibodies have the effect of preventing cellular infection with the virus.
The results showed that for the original strain, almost everyone had neutralizing antibodies, regardless of whether it was after six months or one year and regardless of the severity of symptoms. For the variant strains, a lower proportion of people with neutralizing antibodies was found in asymptomatic and mildly ill patients. In particular, for the Indian and South African strains, the proportion with antibodies was significantly lower by about 30%. For moderate and severe patients, there was a slight decrease.
The team believes that in asymptomatic or milder cases, perhaps because there is less need to fight the virus, fewer antibodies are produced.
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