Medellín itself is low-risk. The day trips change the yellow fever answer.

Some, though most visitors see few. Medellín sits at about 5,000 feet, the day-biting dengue mosquito circulates there year-round at lower levels than on the coast, and bites tend to cluster near standing water after rain. The CDC reports no malaria in the city and generally doesn't recommend yellow fever vaccine for a city-only stay, but its yellow fever map marks most of Antioquia around the city, Guatapé and the coffee farms included, as recommended.

Yellow fever: the city, the day trips and the entry rule

The CDC recommends yellow fever vaccine for most travelers to Colombia aged 9 months and older. Its Colombia page says, "Vaccine is generally not recommended for travel limited to the cities of Barranquilla, Cali, Cartagena, or Medellín." That exception covers the city only. The CDC's yellow fever map marks Medellín with its "generally not recommended" symbol and shades nearly all of Antioquia around it "Vaccination recommended," apart from patches of high ground. Its text puts that cutoff at 7,550 feet (2,300 m). A day trip to Guatapé or a coffee farm below that height leaves the city exception and enters the recommended area.

The entry rule is a separate question. The same page lists Colombia's requirement as "Vaccine is required for all arriving travelers ≥1 year old," and adds that entry requirements are subject to change, so check with a Colombian embassy or consulate. The CDC's Level 2 notice, last reviewed October 16, 2026, says "Most cases are being reported in Tolima," and it doesn't name Antioquia. The Pan American Health Organization's March 2026 alert listed no cases there. If you need the vaccine, the notice says to "Get vaccinated at least 10 days before travel."

Malaria is simpler. The CDC's Colombia page says "No malaria transmission in the cities of Bogotá (the capital), Cartagena, or Medellín," so a city stay needs no medicine. Elsewhere it reports transmission in "All areas <1,700 m (<5,600 ft) elevation." Guatapé sits above that line. Coffee farms vary, so tell the clinic which one you're visiting.

Dengue and the daytime habit

Colombia is on the CDC's global dengue list. In its October 20 update, the Pan American Health Organization counted 83,905 suspected cases nationally through mid-September 2026. That is about 20% below 2025, but national cases had reached outbreak level against historical trends, with DENV-3 now dominant. PAHO also listed Antioquia, Medellín's department, among the places where cases rose by more than 30% in late August and September. The CDC says "There is elevated chikungunya risk in Colombia," and the same mosquito spreads both.

That mosquito breeds in water left in containers and plant pots after rain and bites in daylight, indoors and out. Put repellent on over sunscreen in the morning, and again before a Comuna 13 walk or a late-afternoon coffee tour. Keep windows screened or closed with the air conditioning on, tip out standing water on the balcony, and ask for another room if mosquitoes get in. Coffee-farm gardens and plantation rows are likelier spots for bites than the city. Our dengue & Zika routine has the full schedule.

Where you're going

Scores are for a December–April trip.

Our Colombia briefing covers the full country. Heading to the coast? See Cartagena and Santa Marta & Tayrona.

What travelers report

Paraphrased from TripAdvisor threads and linked so you can read them in full. None gives a year, and bites in Medellín vary a lot from one building to the next.

• Medellín (home near a construction site) · after rain

  In a thread warning about a sharp rise in dengue in Medellín, a poster living in the city said they get 5 to 10 mosquito bites a day even at home and blamed standing water at a construction site across the street. TripAdvisor ↗

• Charlee Hotel, El Poblado

  A guest described being eaten alive by mosquitoes at the Charlee Hotel despite using DEET and air conditioning. A reply guessed that an open container of rainwater nearby had bred them. TripAdvisor ↗

• Provenza, El Poblado

  A traveler worried that bottles left near a street in Provenza would breed mosquitoes. A reply said they were there all the time and had not noticed mosquitoes in any great quantity. TripAdvisor ↗

• Guatapé

  Asked about mosquitoes in Guatapé, a Medellín resident of ten years said they had never been bitten by a mosquito there, although they had been elsewhere. TripAdvisor ↗

One rule outlasts the trip. Any fever during or after your trip means a doctor visit, and you tell the doctor you were in Medellín, naming any day trips outside the city. Dengue usually shows up within two weeks.

Traveler questions