Categories Articles The Delta variant boomed from 10% of all US coronavirus cases to 31% in just 11 days. It’s more dangerous than other variants and could imperil the recovery. Post author By crystalg Post date June 21, 2021 Business Insider Business Insider Tags ‘Imperil, boomed, Cases, coronavirus, could, Dangerous, Days, Delta, from, It's, Just, More, recovery, Than, Variant’, variants ← Learn Investment Strategies with Virtual Access to MoneyShow 2021 → Sweden Sinks Into Political Chaos as Prime Minister Ousted in Key Vote