Soltara does not require the COVID-19 vaccine to join a retreat. For other vaccines, check what your government recommends for travel to Costa Rica, and make sure you are up to date. Routine vaccinations are typically recommended, and it may also be a good idea to consider typhoid. If you are arriving from a country with risk of yellow fever, Costa Rica may require proof of yellow fever vaccination.
Soltara has fewer mosquitoes than many jungle locations because of the ocean breeze, but we still recommend bringing natural bug spray. In rare cases, mosquitoes can carry malaria. If you plan to participate in Ayahuasca ceremonies, avoid taking antimalarial medication for the retreat. You can review official traveler guidance from your government (for example, U.S. travelers often use CDC travel guidance).