These drugs are safe and highly effective against so many viruses for several reasons. Here's how it works.
Any two strands of viral RNA will activate the drug and destroy the infected cells and leave the healthy cells alone.
Why, you might ask? Because healthy cells do not have enough long enough strands of a specific genetic material, dsRNA, to be attacked by the drug, whereas ones that contain extra unknown material (infected cells) do.
The infected cells are killed as the drugs release enzymes to rip apart it's genetic material to the point that the cell is unable to function properly to the point that it dies.
So far, researchers at MIT have tested this family of superdrugs on on human, monkey, pig, and mouse cells, it has been able to kill 18 clinically-significant viruses, for example, even some types of coronaviruses, the common cold, the H1N1 swine flu, dengue fever, arenavirus, which is known to cause encephalitis (a dangerous swelling of the brain), and many more.
So, to the World Health Organization (WHO), and the Centers for Disease Control (CDC), if you are reading this, BRING THEM ON!