It appears that the hospital area is pressurized, given that an &quot;open air promenade&quot; is separately called out as such.<p>Also, the main threats from chronic tuberculosis were lung hemorrhage and inanition (wasting) -- not hypoxemia.<p>For whatever reason, the term &quot;antibiotic&quot; is customarily not applied to anti-tuberculous medications, even though, technically, it applies. &quot;Antibiotic&quot; usually refers to anti-bacterial drugs that are given for a short period of time (a couple weeks), but the definition is hard to pind down. Anti-tuberculous treatments go on for months.