All 155 Countries Make Successful Polio Vaccine Switch, WHO Official Says

STAT: One step closer to a polio-free world
“A two-week campaign to phase out a polio vaccine that is now considered harmful to the effort to eradicate the disease appears to have been completed, polio program leaders at the World Health Organization said Monday. There had been worries that a few countries — China and Russia among them — might not be able to get the job done by May 1. But all 155 nations involved in the unprecedented operation known as ‘the switch’ have complied, director Michel Zaffran told STAT in an interview from Geneva…” (Branswell, 5/2).