Covid-19 variants
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Saudi Arabia reports first Omicron case coming from north Africa
Authorities say infected individual and those in contact with them have been isolated
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Covid vaccine 'very effective' in protection against virus variants: Dr Faisal
Emergence of new variants and strains from coronavirus is a natural phenomenon, says PM’s aide on health
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Vaccine protects Covid-19 survivors against variants
Pfizer/BioNTech, mRNA vaccine protects not only against the original virus strain but also against worrisome variants
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Japan fears Covid-19 variants are behind possible fourth wave
Covid-19 variant first discovered in Britain, taken hold in Osaka region
