A less-virulent poliovirus generated by altering codon usage suggests a new strategy for vaccine development. Figure 1: Development of an attenuated vaccine by two classical methods and the ...

Pakistan’s first nationwide polio campaign of 2025 launched the first week of February, aiming to vaccinate over 45.4 million children under the age of 5 in 159 of the country's 166 districts.

He began investigating the poliovirus. To start with, he had to sort the 125 strains of the virus. He found that they fell into three basic types and knew that a vaccine would have to include ...