You are most likely referring to chemical weapons. They were designed to kill by poisoning or causing disease in people. They were effective, and so devastating that they were banned by the Geneva convention. One of the less documented disease weapons were reportedly used by the American settlers on the Native Americans by giving them blankets with small pox. It killed a lot of Native American men, women, and children by making them sick.
Er...which disease exactly? Different ones have different weapons to fight them and their spread?
You have effective weapons in the form of antibiotics. But when you do not use them properly they will be useless.
Yes they are very effective. Nuclear weapons are dangerous and really effective to destroy all life on earth. They are very powerful.
Type your answer here... horses, disease and metal weapons
Vaccination
There are many factors which resulted in the downfall of the Aztecs. Some of which are: Aztec weapons were too primitive to hurt the spanish warriors, Spaniards introduced a new disease to the Americas which weakened the Aztec society, Spaniards had more advanced and effective weapons etc.
They're effective and deadly.
Medicine and vaccines.
Antibiotics
Better weapons, Incans were destroyed by disease.
Some effective hunting weapons that aren't guns include bows and arrows, crossbows, spears, and traps. These tools have been used for hunting for centuries and can be effective in taking down game animals.
A knife