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A web page from Wikipedia displayed in Google Chrome. The World Wide Web (WWW or simply the Web) is an information system that enables content sharing over the Internet through user-friendly ways meant to appeal to users beyond IT specialists and hobbyists. [1]
As of March 2023, more than 5.5 billion people had received one or more doses [130] (11.8 billion in total) in over 197 countries. The Oxford-AstraZeneca vaccine was the most widely used. [ 131 ] According to a June 2022 study, COVID-19 vaccines prevented an additional 14.4 million to 19.8 million deaths in 185 countries and territories from 8 ...