<p>The Johnson & Johnson vaccine is highly effective against severe Covid-19, including against the South African and Brazil variants, new documents released by the US Food and Drug Administration showed Wednesday.</p>.<p>In large clinical trials, the vaccine efficacy against severe disease was 85.9 per cent in the United States, 81.7 per cent in South Africa, and 87.6 per cent in Brazil.</p>
<p>The Johnson & Johnson vaccine is highly effective against severe Covid-19, including against the South African and Brazil variants, new documents released by the US Food and Drug Administration showed Wednesday.</p>.<p>In large clinical trials, the vaccine efficacy against severe disease was 85.9 per cent in the United States, 81.7 per cent in South Africa, and 87.6 per cent in Brazil.</p>