Fauci -infected fleas bioweapon

WW2- infected fleas bioweapon

Bubonic Plague- infected fleas [bioweapon]?

Spanish Flu- fleas?

Spanish flu

-there were no tests to confirm-

The cramped living arrangements of animals and people, especially the military, during World War I.

-The exceptional ability of the virus to copy itself and infect the lungs. This last feature was found during research into the 1918 virus, using tissue found in people who had died from the Spanish flu.

comparison to Covid

COVID-19 has killed as many people in the U.S. as the Spanish flu did. But the population of the U.S. is now three times more than it was in 1918, so Spanish flu killed a larger percentage of Americans than COVID-19 has to date. If we look at the cause of death, people who had Spanish flu generally died from pneumonia and people who had COVID-19 died from multiple organ failure. Even in the case of people who developed ARDS after infection by each virus, the fatality rate was 100% for Spanish flu, as compared to 53.4% for COVID-19 because there were no treatments for infected individuals. The Spanish flu was also more deadly to healthy younger people, while COVID-19 has mostly affected people who are 65 years or older who have other diseases until the delta variant, which is infecting younger and healthier people more than prior COVID-19 variants.

Are all flus and viruses and conditions manmade bioweapons spread through parasites?

https://my.clevelandclinic.org/health/diseases/21777-spanish-flu