Omicron: Pfizer, BioNTech and Moderna race to tweak Covid vaccines against new Coronavirus variant

Work is underway to look at tweaking vaccines against the new concerning strain of coronavirus that has sparked travel bans. The variant, named Omicron and designated a “variant of concern” by the World Health Organisation (WHO), has reached Belgium after being discovered in South Africa. The WHO warned that preliminary evidence suggests the variant has [...]