Covid-19 state of emergency extended in Japan

Covid-19 research by Japanese scientists: Antibody caused by the virus may be insufficient

While the concern of mutation in the Covid-19 epidemic continued to occupy the agenda of the world public opinion, Japanese scientists carried out a scientific study on the protection potential of antibodies formed in infected people.

Scientists from Yokohama City University, who examined 250 people between the ages of 21-78 who tested positive for Covid-19 between February and April last year, said that 97 percent of patients with mild or no symptoms showed Covid-19 6 months after infection. Detected that antibody has formed against.

It was stated that 96 percent of the patients protected antibodies 1 year after the infection, while antibodies were observed in all those who had more severe disease even 1 year later.


The study found that 69 percent of patients with mild symptoms or no symptoms produced antibodies against the South African mutation 6 months after infection, while the rate was 75 percent for the Indian mutation, 81 percent for the Brazilian mutation, and 85 percent for the UK mutation.

It was stated that the percentage of those who developed antibodies against different mutations from the group in question decreased even more after 1 year.


In the early stages of the epidemic, it was found that 90 percent of people infected with Covid-19 but survived the disease with moderate to severe symptoms had antibodies capable of fighting any of the 4 mutations even 12 months after the infection.


It was stated that the results of the study revealed that patients who were infected in the first days of the epidemic and especially those with asymptomatic or mild symptoms should still be vaccinated against different mutations. Experts pointed out that the group in question does not produce antibodies as much as the body’s disease.

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