<Anchor> The



US is reviewing whether or not it is necessary to get three doses of the vaccine in order to maximize the effectiveness of the vaccine. I think a conclusion will come out around this fall. Whether the Janssen vaccine, which had been suspended due to a blood clot side effect, will be reopened in the U.S. will soon be decided.



This is Kim Yoon-soo, correspondent from Washington. 



<Reporter>



Dr. Pouch, the highest authority on Corona 19 in the United States,

said that

judgments on additional vaccinations and booster shots will be made at the end of this summer or at the beginning of autumn.



He explained that the U.S. health authorities, not the pharmaceutical company, would decide.



Earlier, Modena and Pfizer entered a boostershot clinical trial to maximize the effectiveness of the vaccine as concerns over the mutant virus grew.



[Jax/Modena Chief Medical Officer: By the end of this year, we expect that preparations will be over to supply booster shots for building the immune system we need.] As the



US sweeps away both Pfizer and Modena vaccines There is growing concern that the vaccine crisis in countries around the world will be further aggravated if the decision to boost the shot is made.



The Janssen vaccine, which had been discontinued in the United States due to the side effects of blood clots due to an overwhelming attack, is expected to resume use soon, conditionally.



[Pouch/U.S. National Allergy and Infectious Diseases Research Center: It is expected that the Janssen vaccine can be reused in any form. If there is a decision to cancel, it's a serious situation, and that won't happen.]



With more than half of adults in the U.S. getting vaccinated more than once, U.S. health officials have planned to get children of all ages vaccinated by the first quarter of next year.