３回接種、オミクロン株に効果　中和抗体、保有率１００％に―神戸大

　神戸大の研究グループは１８日、新型コロナウイルスワクチンの３回目接種で、変異株「オミクロン株」を不活化する中和抗体の量が増えることが確認されたと発表した。同株に対する３回目接種の効果を示す研究発表は国内初という。
　昨年１２月上旬に米ファイザー製ワクチンの３回目接種を受けた神戸大の２０～６０代の医師６５人を今月調査。２回目接種の半年後に５％だったオミクロン株に対する中和抗体の保有率が、３回目接種の２週間～１カ月後に１００％に上り、抗体の量を示す数値も３回目接種によって平均で６４倍増えた。（2022/01/18-19:52）

A research team of Kobe University has confirmed that a booster vaccine dose is effective in increasing neutralizing antibodies that inactivate the highly contagious omicron variant of the novel coronavirus.
   This is the first research finding announced in Japan that indicates the effectiveness of a third vaccine shot against omicron.
   The research covered 65 doctors at Kobe University in their 20s to 60s who received a booster dose of U.S. drug giant Pfizer Inc.'s COVID-19 vaccine in early December last year.
   Of the doctors, the proportion of those with neutralizing antibodies against omicron stood at 5 pct six months after they received a second vaccine dose.
   In two weeks to a month after the doctors received a booster shot, the antibody prevalence rate jumped to 100 pct, the team said on Tuesday. The amount of antibodies soared 64-fold on average following the third vaccination.