Henry
We know very little. The fact that this is widespread points to a singular source or adversary rather than random magical poisonings. Unfortunately, with most magical research being off the table, it's taking longer than I'd like to figure out.
However, with our defense teams and the intelligence of our technology (admittedly something I understand very little about), we're still well-protected. Lots of smart people are working this.
But I would very much like to have a better answer for you. Are you feeling all right at present?