Dozens of cases of acute flaccid myelitis have occurred this year, and while it resembles polio, health officials have ruled out poliovirus.

Julius Youngner collaborated with Jonas Salk on the polio vaccine, and later identified interferon gamma and contributed to an equine influenza vaccine.

Using epidemiological and laboratory data, scientists have mapped out a sequence of mutations through which the attenuated oral polio vaccine reverts to a virulent virus.

Researchers are developing polio vaccines based on the viral capsid alone. When produced in recombinant systems, these could eliminate the need to propagate live poliovirus for vaccine production. 

A selection of notable quotes from the American Society for Microbiology’s annual meeting

Researchers develop new attenuated viruses that could support the eradication effort.

As the world inches closer to polio eradication, laboratories studying the virus will have to bolster biosafety standards. Eventually, most will need to stop working with the pathogen entirely.

It’s been more than a year since the country has reported a case of wild poliovirus, according to the World Health Organization.