Nine polio immunization workers shot in Nigeria; FluGen pushes toward universal flu vaccine;

@AlisonBFierce: 2012 marked the largest whooping cough outbreak in 50 years. A new vaccine-resistant strain may be to blame. Report | Follow @AlisonBFierce

> Researchers are looking into microbes to improve immune responses to a wide range of vaccines. Story

> At least 9 polio immunization workers were fatally shot in Nigeria, just months after similar attacks killed 9 in Pakistan. News (sub. req.)

> Human metapneumovirus, a respiratory virus unknown to doctors until 2001, causes the same severity of illness in young children as the flu. Article

And Finally... FluGen, a Wisconsin-based vaccine and vaccine delivery product company, has moved closer to developing a universal flu vaccine. Release