Polio virus particle, computer illustration. Kateryna Kon | Science Photo Library | Getty Images Polio tau pom nyob rau hauv cov qauv dej khib nyiab coj los ntawm ob lub nroog sab nraum New York City qhia ...
Polio virus particle, computer illustration. Kateryna Kon | Science Photo Library | Getty Images Polio tau pom nyob rau hauv cov qauv dej khib nyiab coj los ntawm ob lub nroog sab nraum New York City qhia ...