Condom use and targeted screening are the most important weapons against gonorrhea. Attentiveness to antibiotic resistance trends is also critical.
You have effective weapons in the form of antibiotics. But when you do not use them properly they will be useless.
Vaccination
The most effective weapons against pneumonia are anitbiotics.
Medicine and vaccines.
Antibiotics
A knife
maggots eat the dead flesh
Zinc has been proven to be an effective weapon if it is taken within 24 hours of the first symptoms appearing. There are no other weapons yet identified.
Er...which disease exactly? Different ones have different weapons to fight them and their spread?
The Spanish had weapons such as lances and Spanish steel swords. They also used harquebus, which were effective but heavy and slow. This made it easy to defend their territories against enemies.
Antibiotics are used to treat scarlet fever. It is important to wash hands often.
Las cannon for a standard devastator marine or a missile launcher, but they are only effective against tanks