| PTI | pancreatic trypsin inhibitor; persistent tolerant infection; Pictorial Test of Intelligence; placent... |
|---|---|
| RRI | recurrent respiratory infection; reflex relaxation index; relative response index |
| RRIS | recurrent respiratory infection syndrome |
| RTI | respiratory tract infection; reverse transcriptase inhibition |
| RURTI | recurrent upper respiratory tract infection |
| PHI | primary HIV infection |
|---|---|
| SBI | serious bacterial infection |
| URI | upper respiratory tract infection |
| WPI | week post infection |