Sept. 16, 2014 11:33 AM PT FacebookTwitterShow more sharing optionsShareClose extra sharing options Facebook Twitter LinkedIn Email Copy Link URLCopied!Print 1 More H1N1 Vaccine Recalled In the second such recall this season, manufacturer MedImmune says the vaccine has lost potency since it was made. ‘This is not a safety issue,’ a U.S. official says.2 Obesity puts swine flu sufferers at greater risk, study suggests A study in California shows that about a quarter of the people hospitalized for H1N1 complications were morbidly obese, even though less than 5% of the population falls into that category.3 Farmers fear pigs may get ‘swine’ flu from people Humans have it. Pigs don’t. 4 World & Nation Do face masks help prevent swine flu infection? Surgical masks help stop droplets from spreading, but respirators are designed to filter small particles. If used correctly, respirators are more likely to reduce flu risk, the CDC says.