Typically, B-type influenza viruses only spread within a small area.
At this moment, Shen Qiang, observing the virus within the Plague Source leaf, was like watching under a microscope, able not only to clearly see those flu germs quietly undergoing subtle changes.
He could also vividly sense from the Plague Source that these lines of flu germs were rapidly evolving from HA1, HA2, towards a higher level, in virtually the blink of an eye.
There were eight mutation points in its cellular nodes.
Such a terrifying speed of evolution made Shen Qiang involuntarily draw in a breath of cold air.
Normally, when infected with an ordinary B-type influenza, one would usually just sneeze, cough, have a runny nose, and in more severe cases develop a fever, headache, and sore throat.
Only in the most severe cases, combined with the patient's immune system being too weak, could it possibly lead to a very few deaths.
But the situation was different now.
