What is second aid?

Too little to late.

“Should-I-Risk-To-Go-To-The-ER-And-File-For-Bankruptcy-Afterwards-Aid” (or just bleed to death right here right now aid)

Right now? Ventilators.

Ambulance arriving after giving artificial respiration

Rapid amputation.

@RedDeerGuy1 That depends on what took place with First Aid.

Washing down a glass of Kool Aide with a cold beer on a hot day. Second aide.

Like the main course after appetizer.

@Six Welcome to Fluther!

A second glass of Pappy Van Winkle

First Aide: supplies to take care of yourself.
Second Aide: Supplies to take care of others.

see link to video on what supplies needed for both:

https://www.youtube.com/watch?v=nzNfrRtTXGw

@filmfann
Thank you. So far, so good.