The US just added another powerful tool against Covid-19 to its inventory: a third vaccine.
Credit: Johnson & Johnson/AP
Dateline: USA
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All our recent progress with Covid-19 could be wiped out by variants, CDC director says. 'Please stay strong'
The US is at risk of losing all its recent gains in the battle against Covid-19 as highly contagious variants take advantage of Americans getting lax with safety measures.
