Influenza -- China
The National Institute of Virology, [NIV] Pune, ruled out mutation theory and some experts believe that the jump in numbers could be attributed to 2 factors: antigenic drift and the spread of a different strain (sub-type of virus) of H1N1 virus.
According to the US Centres of Disease Control, "antigenic drift are small changes in the genes of influenza viruses that happen continually over time as the virus replicates. These small genetic changes usually produce viruses that are closely
Read more about it at HealthMap Global Disease Alerts via http://bit.ly/2gLPdvd
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