by Sebastien ASH FRANKFURT, Germany (AFP) — Two doses of the BioNTech and Pfizer coronavirus vaccine may not be enough to protect against the Omicron strain, the companies warned Wednesday, but they stressed it was “still effective” after a third jab. The companies’ news was called reassuring by experts, and came as the first independent data from labs around the world emerged, suggesting that the new variant is better at evading vaccine-trained immunity […]