Fortunately malaria is not a problem around Puerto Viejo. Around Bataan, 40 km west from Limon Malaria was reported in October 2006. However, this is almost 100 km from our area. In the areas around Puntarenas, at the pacific site, several cases are reported. It is very rare that I hear of people who get a malaria infection around Puerto Viejo. But if you feel saver, or you travel trough different areas where malaria is reported, I would recommend you to keep taking your prophylaxis tablets. If your doctor describes you Lariam, that is really to much!! Watch out with that stuff!! More alarming is a Dengue infection. This mosquito only bites during the day. They are sometimes reported, but if you take proper precautions the change to get infected is very small.