WASHINGTON - In a press briefing Friday, the head of the WHO said the delta variant is "quickly becoming the dominant strain in many countries," and thus, the world is in a "very dangerous period" of the COVID-19 pandemic."Delta is spreading in at least 98 countries and is spreading quickly in countries with low and high vaccination coverage," WHO Director-General Dr.
Tedros Adhanom Ghebreyesus said. According to WHO, cases are doubling every three weeks in Africa — with more than 20,000 new cases reported Friday in South Africa.Meanwhile, Public Health England says cases of the delta variant have increased fourfold in the U.K.