The "bivalent" jab, made by Pfizer/BioNTech, is directed at the highly infectious BA.4 and BA.5 types of the variant.
The European Medicines Agency has approved jabs targeting both the original virus and the BA.1 subvariant of Omicron ahead of a feared Covid surge in the latter part of this year.
Moderna says Pfizer and BioNTech’s vaccine Comirnaty infringes on patents Moderna filed several years ago protecting the technology behind its preventive shot, Spikevax.
The two partners, makers of the Western world's most widely used Covid-19 shot, are currently discussing with regulators enhanced versions of their established shot to better protect against the Omicron variant and its sublineages.
The vaccine can now be used as a booster following the two-dose Vaxzevria schedule or by those who have been vaccinated by an mRNA vaccine, such as the ones by Pfizer and BioNTech or Moderna.
A study on 1.3 million people aged 60 and older looked at data from the Israeli Ministry of Health database between January 10 and March 2, when the Omicron variant was predominant.
Covid-19 has infected more than 435M people and killed over 5.96M worldwide. Here are some of the latest coronavirus-related developments:
Covid-19 has infected more than 418M people and killed over 5.8M worldwide. Here are some of the latest coronavirus-related developments:
Covid-19 has infected more than 382M people and killed over 5.7M worldwide. Here are some of the latest coronavirus-related developments:
The Omicron variant can partially evade the protection from Pfizer and BioNTech's coronavirus vaccine, according to research.
BioNTech's Chief Executive Ugur Sahin says the established vaccine will likely prevent hospitalisation from the new Omicron virus variant and there is no reason to be particularly worried.
New cases were confirmed in Australia, Germany, UK and Italy, while Israel closes its borders to all foreigners in a bid to stem the spread of the new Omicron variant of the coronavirus.
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