The L strain is in Italy. The S strain is on the west coast.
L is the strain designation. I remember it as “Lethal.” The S strain just makes you sick.
The last time I heard this discussed the doc on TV said it didn’t matter. I think he was a very goof looking podiatrist.
I have no idea if they are relevant.
I think they may have the L strain in Albany, GA, it is really bad there...