A type of poliovirus derived from vaccines has been detected in London sewage samples, the World Health Organization and British health officials said Wednesday, adding that more analysis was...
from Polio Virus Detected In London Sewage Samples: WHO https://ift.tt/RytwUL6
from Polio Virus Detected In London Sewage Samples: WHO https://ift.tt/RytwUL6
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