Attack in Pakistan underscores ongoing threat to polio workers

Gunmen killed four health workers and wounded three in Quetta. Polio cases are at a 15-year high in Pakistan, where suspicion of vaccination programs has run high. 

By , Staff writer

Naseer Ahmed/Reuters

Gunmen killed four health workers who were part of a polio vaccination team in Pakistan on Wednesday, an attack that highlights the risks of fighting the disease across the country.