China News Service, May 3, comprehensive Japanese media news, the research team of the Central Civic Hospital in Kobe City Medical Center, Japan announced on the 2nd that blood tests on 1,000 patients found that about 3% had antibodies that showed that they had been infected with the new coronavirus.
In the 8-day period from the end of March to April 7 this year, the team randomly selected 1,000 patients who came to the outpatient clinic not for infection of the new crown virus but for other reasons. The antibodies formed after the virus were examined, and 33 of them detected IgG antibodies formed after a period of infection.
Data map: April 25, local time, Tokyo, Japan, a lady wearing a mask walks through an empty shopping area.
The Japan Broadcasting Association reported that the team stated that the investigation object was limited to outpatients, and the accuracy of the examination had certain limitations. According to the Kyodo News Agency, if the calculation is based on the gender and age distribution of the entire Kobe city, before the announcement of the emergency situation on April 7, about 41,000 people equivalent to 2.7% had contracted the new crown.
The PCR test is a method to detect whether the sample taken from the nasal cavity or throat of the subject contains new coronavirus DNA and determine whether it is infected.
Dean Koraki Koraki pointed out that "the results show that there may be a considerable number of people infected, and PCR testing alone cannot grasp the actual situation." It is believed that if the proportion of the number of infected people can be grasped by antibody inspection, it can be used as a basis for judging whether to relax the restrictions on going out and activities.