Travel Vaccinations for Puerto Rico

West Nile virus (WNV) is spread by mosquitoes in many countries. There are usually no symptoms, although some people develop mild flu-like symptoms, nausea and skin rash. The virus is not contagious and should get better without any treatment.

Zika virus is usually transmitted by the bite of an infected Aedes species mosquito. These mosquitoes are most active during the day, especially during mid-morning, then late afternoon and dusk through to evening. For most people it's a very mild infection with minor or no symptoms, but is more of a risk to pregnant woman as it could result in certain birth defects.

Chikungunya is a viral disease transmitted to humans by infected mosquitoes and it causes fever and severe joint pain. Other symptoms include muscle pain, headache, nausea, fatigue and rash. Joint pain is often debilitating and can vary in duration. The disease shares some clinical signs with Dengue, and can be misdiagnosed in areas where Dengue is common. There is no cure for the disease. Treatment is focused on relieving the symptoms.

Schistosomiasis, also called bilharzia, is an infection caused by a parasitic worm that lives in fresh water in subtropical and tropical regions. Avoid swimming in fresh water rivers, streams and lakes if you can. You often don't have any symptoms at first, but after a few weeks may develop a rash, high temperature, cough, diarrhoea and joint pain. Schistosomiasis can usually be treated successfully with a short course of a medication that kills the worms.