Ping Pong in virus world – Swine flu from Pigs to humans back to pigs…

Swine flue jumps from humans to pigs. This back and forth, keeps the virus alive and also helps it evolve. Scientists have been observing the effects of animal to human virus transmission. But diseases go the other way too. It’s important to understand this and the mutations that take place in animals to fully understand and combat the killer bugs.

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