Health encyclopaedia - Alphabetical Topic List Enciclopedia de salud - por orden alfabético la lista de temas

| A | | A | | B | | B | | C | | C | | D | | D | | E | | E | | F | | F | | G | | G | | H | | H | | I | | I | | J | | J | | K | | K | | L | | L | | M | | M |
| N | | N | | O | | O | | P | | P | | Q | | Q | | R | | R | | S | | S | | T | | T | | U | | U | | V | | V | | W | | W | | X | | X | | Y | | Y |

Causes of Respiratory tract infection Las causas de infección de las vías respiratorias

Most URTIs are caused by viruses. La mayoría de URTIs son causados por virus.

LRTIs are caused by both viruses and bacteria. LRTIs son causados tanto por virus y bacterias. People with poorly functioning immune systems are prone to catching fungal lung infections. Las personas con mal funcionamiento de sistemas inmunes son propensos a la captura de las infecciones por hongos en los pulmones.