I was wondering what this random disease I kept getting when talking around people was until I realized it was Tuberculosis / Pneumonia. You can literally contract it just from being within 6ft of someone breathing or talking to you. But why was I getting it a lot more now than before? Well, in my country we have exploded in immigrants from India, China, Africa, South America, where they have insane rates of lung and stomach diseases.
The West has much higher hygienic standards and stronger immune systems. The 3rd world immigrants are literally a bioweapon. You have to keep brushing your teeth and use baking soda to get rid of the disease. I haven't developed an immunity to it either the only way is to fight it is with common sense hygiene practices. Maybe screening immigrants for diseases would be common sense too…
https://ourworldindata.org/grapher/number-of-tuberculosis-cases