In 1946, future pharmaceutical czar George Merck reported to the US Secretary of War, that he'd managed to weaponise the toxin extracted from the Brucella bacterium and to isolate it into an indestructible crystalline form using only the DNA particles.
Aerial spraying of the crystals via chemtrails was deployed on Chinese and Korean populations during the Korean War. Many veterans of the war later developed Multiple Sclerosis. The army recognized that the MS was Brucella-related and paid the veterans compensation. Although the Brucella micoplasma can lay dormant for decades, it can be triggered by vaccines. Vaccines have been mandatory in the US military since 1911.