Scientists may have uncovered an important aspect of long covid. Recent research appears to show that the blood of these ...

Dear Dr. Roach: My husband was diagnosed with secondary polycythemia in 2011. His hematocrit test (HCT) was 57%. He was ...

Have a USB device near you? Look closely at the port -- do you see a color? It turns out that it actually means something.

USB port colors range from black and blue to red and purple. Each color has its own meaning, which is worth understanding if ...