On: Why the second wave of the 1918 Spanish flu was so...

[refurb]

Sulfonamides were used widely before penicillin was (1930's).

https://en.wikipedia.org/wiki/Sulfonamide_(medicine)

[btilly → refurb]

Yes, but the ones used at that point slow bacteria growt, but do not kill bacteria. They are therefore not considered antibiotics.

They were also discovered after the Spanish flu.