CDC Yellow Book
- La Crosse encephalitis virus
- β-lactam antibiotics
- larva currens
- Lassa fever
- last-minute travelers
- latent TB infection (LTBI)
- Latvia
- lead level, blood [table]
- Lebanon
- leisure travelers, business travelers vs
- lenalidomide (Revlimid) [table]
- leprosy (Hansen disease)
- Lesotho
- levofloxacin [table]
- LGBTI travelers
- Libya
- Liechtenstein
- light exposure, jet lag and
- linear lesions
- Lithuania
- Löffler syndrome
- loiasis
- long-distance travelers, VTE prevention for
- loperamide
- louping ill virus
- LTBI (latent TB infection)
- Lujo virus
- lung flukes
- Luxembourg
- lymphangitis-associated rickettsiosis [table]
- lymphocutaneous spread of infection
- lymphocytic leukemia, chronic
- lymphogranuloma venereum [table]