Third vaccination expert "It is important to proceed with vaccination from December to January"

Regarding the third vaccination of the new coronavirus vaccine, Professor Kazuhiro Tateda of Toho University, a member of the government subcommittee on measures against the new coronavirus, said, "6 to 8 months after vaccination, the antibody titer is inevitable. The number of vaccines is declining and breakthrough infections are likely to occur, and the number of countries where vaccination has progressed is beginning to increase again. From January to January, the number of people who have been vaccinated 6 or 8 months after the first vaccination will increase, which may cause rebound, so it is important to proceed with the third vaccination. "

Regarding what kind of people should be prioritized for the third vaccination, "When elderly people and people with underlying diseases develop breakthrough infections, it is now becoming more serious at a certain rate overseas. In Japan as well, it is important to firmly promote additional vaccinations to those who need them from December to January. "

The National Institutes of Health in the United States showed the results of a clinical trial of 458 people last month on which vaccine to use for booster vaccination. Two weeks later, the value of the neutralizing antibody against the conventional new coronavirus is about 10 to 30 times higher, suggesting that the immune response is strengthened.

Professor Tateda said, "If the vaccine to be inoculated is the same as the second vaccine, the site of inoculation will be very difficult and it is possible that the vaccine will be missed. By changing the second and third vaccines, So far, no significant reduction in efficacy has been reported, and it is important to proceed with a third dose to those who need it, and the side reactions are the same as or slightly less severe than the second dose. I've seen reports, and I don't think I need to worry about it because it's the third time. "

Israel allows different vaccinations for the third time

In Israel in the Middle East, vaccination with the new coronavirus began in December last year, and vaccination has progressed at a rapid pace worldwide.

Of the 9.3 million population in Israel, about 30% are under the age of 17, but so far, 5.73 million people, 61% of the population, have been vaccinated twice.

In August, the Israeli government started the third vaccination for people aged 60 and over, more than five months after the second vaccination, and the target age has been gradually lowered since then, and now it is 12 years and over. People are targeted.

By the 3rd of this month, 69% of those who received the second dose, or 3.96 million, had completed the third dose.

The third vaccination is performed at a clinic operated by an institution responsible for the public insurance system or at an inoculation venue operated by a local government, and there are cases where the Pfizer vaccine is used in the same way as the first and second vaccinations. In most cases, a third dose of a different vaccine is also allowed.

In Israel, after vaccination progressed, the number of newly infected people per day decreased to the single digit level for a while in June, but the number of infected people increased again due to the spread of highly infectious mutant virus. However, from August to September, the number exceeded 10,000.

However, since then, the number of infected people has decreased, and now the average number of people per week is in the 500s.

The third inoculation in the United States is for people aged 65 and over who are at high risk of becoming severe.

In the United States, booster vaccinations to enhance the effectiveness of the new coronavirus vaccine will start in September for Pfizer vaccines and last month for Moderna and Johnson & Johnson vaccines. it was done.

Pfizer and Moderna's third vaccinations are for all people over the age of 65 and those over the age of 18 who are resident in long-term care facilities or have an underlying disorder at high risk of becoming severe. People, people in occupations with a high risk of infection, etc.

The vaccines of these two companies will be available for the third dose at least 6 months after the second dose, but the modelna vaccine will be given in half the amount of the previous vaccine.

On the other hand, in the case of Johnson & Johnson, all people over the age of 18 who are two months after vaccination are eligible.

In addition, with additional vaccinations, it is possible to inoculate a different type of vaccine than the one that was originally given.

To date, more than 20 million people have received additional vaccinations in the United States, including those with immunodeficiency and those who have had an organ transplant.