Two doses of Covid-19 vaccine provide 87% efficacy

Two doses of Covid-19 vaccine provide 87% efficacy Disclosure

The study was carried out by a team including researchers from Nagasaki University.

Taking two doses of vaccine, both from Pfizer and Moderna, is 86,8% effective against developing Covid-19, announced on Tuesday (5) a team including researchers from the University of Nagasaki.

The team's vaccine efficacy data is about 10 percentage points below the numbers presented by the National Institute of Infectious Diseases (NIID).

The researchers, however, conducted the study about a month later, at a point when they believed the alpha variant of the virus had been replaced by the highly transmissible delta.

The team conducted the study in July and August at 10 medical institutions in 9 provinces and examined 890 individuals between 16 and 64 years of age suspected of having been infected with the coronavirus.

Of the 528 people who had not been vaccinated, 213 tested positive. Of the 108 who had received the first dose, 31 tested positive, while only 9 of 159 individuals who had been inoculated twice had been infected with Covid-19.

Results from a study conducted by the NIID from June to July showed that receiving two doses of vaccine was 95% effective.

However, Haruka Maeda, a researcher especially aimed at respiratory infection at Nagasaki University, said the vaccine's effectiveness may have weakened because the delta variant increased in June.

Maeda also emphasized that "despite this, it has been confirmed that the effectiveness of vaccines is still high in Japan as well."

Source: Mainichi


Read 56 times

Leave a comment

Make sure you enter all the required information, indicated by an asterisk (*). HTML code is not allowed.

Public clarification note

Free website, no charge to our readers or visitors, the sole purpose and dissemination of information and real news, all credits are to their respective sources and authors.

In compliance with the Laws:

In compliance with Article 46, I of Law 9610/98 Brazil - Article 46, I of Law 9610/98 and Law No. 5.250 of February 9, 1967 - Law 2083/53 | Law No. 2.083 of November 12, 1953.

For more information and legal support, consult our collaborating lawyer: Raphael Guilherme da Silva - OAB/SP Under No. 316.914.

If you disagree with any article, we will remove it immediately and we apologize publicly by retracting it as required by law.

Thank you in advance.

This news portal is an initiative of a Group of volunteer contributors about registration in Japan -目標新聞 (コネクション・ジャパン). - .

And it is maintained by its volunteers and collaborators in order to allow the colony of Brazilians to have access to this information for free and to all other visitors who wish to access our website.

Some remarks in the Law No. 9.610/98.

Use of an author's work for study or criticism;

Use of an author's work to display a product (for example: a picture frame store that displays a picture frame containing a photo);

Use of copyrighted work for private purposes (if you share it with someone, it is no longer a use private!);

And others provided for in Law No. 9.610/98.

« October 2021 »
Mon your Wed thu fri Sat Sun
        1 2 3
4 5 6 7 8 9 10
11 12 13 14 15 16 17
18 19 20 21 22 23 24
25 26 27 28 29 30 31


visit counter

Last 7 days:493

Connected simultaneously



Online Visitors


Go to top