The San Francisco district with the most illegal aliens is the Mission District, where the per capita incidence of tuberculosis is exactly the same as that in Mexico.
One of my favorite illegal alien stories was about a Guatemala AIDS patient whose service animal was an iguana.
His treatment was free and his apartment was the free and the heating was free:
Iguanas are cold blooded so his apartment had to be heated like a jungle 24 hours a day, but he could bring his iguana anywhere including in inside SF restaurants and on trains; everyone is legally terrified to ask questions.
Free for him, we foot the bill.