A sideview: treatment of tuberculosis has a long standing approach with exposure to sunlight. As far back as Hippocrates the notion of sunlight as remedy for Tuberculosis was evident.
This does call for some clarification as we, in the modern age, refer to "sunlight" as we would penicillin or a bypass operation but in recent history this was not so.
It was gleaned that patients became susceptible to tuberculosis who lived in the squalor of large cities where with its human congestion and attendant lack of sunlight .
In this perspective "sunlight" becomes an environmental issue where lack thereof can initiate a tubercular reaction.
"TB is susceptible to ultraviolet light, including sunlight, but transmission is facilitated by overcrowding and poor ventilation. Additionally, the transition from infection to disease is highly dependent on the integrity of the host's immune system."(internet search)
The above refers to "sunlight" as a remedy or pill or a procedure whereas what was presented previously speaks to environmental issues.
I'll go out on a limb here but take note what others have written in this thread of the air clearing up around the offending province when everything was shut down . I was struck by this finding and wonder, only wonder, if again the primary agent of this disease was an environmental one in which people are within a state of congested crowding with lack of the appropriate sunlight in order to thrive appropriately; only a thought.
Pigs, cows, dogs, animals of every kind within the human environment, if not properly managed, can be a nidus of further deleterium.