<Anchor> In the

United States, concerns are growing as the number of confirmed children has increased significantly in the past month, when face-to-face classes were held along with the opening of schools. On the other hand, there is an observation that the US authorities will reduce the vaccination interval of the booster shot, which is additionally given after the second dose, from 8 months to 6 months.

Correspondent Kim Jong-won of New York.

<Reporter> The

heroes of the movie appeared in the middle of Times Square in New York.

This event is to encourage vaccination of students 12 years of age and older.

The number of children infected in the past week was 180,000, nearly five times higher than in the last week of July.

[Alan Levin / Director of Ballard Health Hospital: More than a third of the corona tests conducted at our hospital are children under the age of 18. If the number of confirmed cases continues to increase like this, the corona will continue to spread in schools.]

Schools that have returned to face-to-face classes from the new semester have made it compulsory to wear a mask in school.

[Joe Biden/President of the United States: Please make sure your children wear masks when they leave the house. In particular, if you haven't received the vaccine yet, please, please, wear a mask right now.]

In the midst of this, there was a report that the US authorities would push the third booster dose of the vaccine from 8 months to 6 months after the second dose.

In the case of the Pfizer vaccine, a study showed that the effectiveness of the Pfizer vaccine drops to 60% after 6 months after the second dose.

There are also concerns that if the U.S. increases the interval between the third booster dose to six months, the global vaccine supply, which is still lacking, may be further reduced in the winter when the spread of the corona is more active.

(Video coverage: Lee Sang-wook, video editing: Jung Yong-hwa)