In the coming days, people in the United States and the United Kingdom will be among the first to receive a new breed of COVID-19 vaccine. The hope was that these updated vaccines — based on Omicron variants of the SARS-CoV-2 virus — would offer substantially greater protection than older vaccines based on the strain of the virus that emerged in 2019.
(CNN) Here's a look at the coronavirus outbreak, declared a pandemic by the World Health Organization. The coronavirus, called Covid-19 by WHO, originated in China and is the cousin of the SARS virus.
... the EU drug regulator said the two messenger RNA boosters offered protection both against the original version of COVID-19 and the omicron subvariant BA.1, which has since been overtaken globally by later omicron subvariants BA.4 and BA.5. Nearly 80% of coronavirus cases worldwide are now being caused by omicron BA.5, according to the World Health Organization.
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