1.   And if just a few particles of virus survive, they may become drug resistant, blossoming into even more lethal microbes.

2.   It also requires drug and background checks on lab workers who handle certain lethal microbes.

3.   They gather intelligence on invading armies of lethal microbes and take swift covert action to vanquish them.

4.   Ironically, the finding gives new evidence that the lethal microbe shares an evolutionary history with an important component of healthy cells.