| CD4 | HIV helper cell count |
|---|---|
| CTh | carrier-specific T-helper [cell] |
| HF | Hageman factor; haplotype frequency; hard filled [capsule]; hay fever; head of fetus; head forward; ... |
| H/S | helper-suppressor [ratio] |
| ISH | icteric serum hepatitis; in situ hybridization; internal self helper; International Society of Hemat... |