The OraQuick HIV test typically costs about $40–$45 in U.S. pharmacies; many public programs mail kits free.

In the U.S., an oral HIV self-test costs about $45 retail, while clinic mouth-swab testing is often free or under $20.

Most COVID-19 vaccine doses range from 0.3 mL to 0.5 mL, based on the brand and the age group.

Out-of-pocket COVID testing typically runs $8–$30 for self-tests, about $30 at pharmacies, and $50–$150+ for clinic or lab PCR.

One unit collected from a donor is ~450–500 mL; the red-cell component used in transfusion is typically 250–350 mL.

In the U.S., an ICU night often runs $3,000–$10,000+, with day-one and ventilation cases landing higher.

Most home oxygen therapy prescriptions use 1–3 L/min at rest and 2–5 L/min with activity, adjusted to keep saturation at or above 90%.

Medical oxygen runs about $0.05–$2.00 per hour, depending on device type, flow rate, power costs, and whether you use tanks or liquid oxygen.

In the U.S., an oxygen tank typically costs $110–$300 for E size and $600–$800 for H steel, plus $18–$45 per refill.

Home units often sell for $500–$2,000, while portable concentrators usually run $1,500–$3,500 before insurance or rentals.