Saudi Arabia’s authorities will approve a third Covid-19 vaccine only after it has passed all regulations and necessary stages in order to ensure its safety for residents, according to a Ministry of Health official. Ministry spokesman Dr. Mohammed Al-Abd Al-Aly told Sunday’s coronavirus press conference that two vaccines were available in the Kingdom, Pfizer-BioNTech and Oxford-AstraZeneca, and any announcement of a third would only be after it had been cleared ...