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Analysis: Study suggests new Omicron-specific vaccines offer only similar protection to existing boosters

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.

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Reference: Time line of Covid-19 Pandemic developments

Time line:

(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.

 ...  (dates of important developments follow)

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EU regulator clears updated versions of COVID vaccine boosters

... 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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