Honest about the risks, and specific about what prevents each one.
Rabies
CDC says rabid dogs are commonly found in the Philippines, and has flagged counterfeit rabies vaccine circulating in the country. Street dogs are everywhere, including on the islands, and puppies are the ones children approach.
Prevention Do not touch dogs, cats or monkeys, however friendly. Wash any bite, scratch or lick on broken skin for a full fifteen minutes and seek medical advice the same day. Discuss pre-exposure vaccination before you go — here more than most places.
Dengue
A risk to travellers, spread by daytime-biting mosquitoes and varying by season and region. The Government of Canada notes there is no vaccine or medication available in Canada to prevent it.
Prevention Repellent through the day, not just at dusk. Air-conditioned or screened rooms.
Typhoons and flooding
The Government of Canada notes the Philippines experiences around twenty typhoons a year, mostly between June and November, with flooding and mudslides frequent, plus earthquakes, volcanoes and tsunami risk.
Prevention Build slack into island-hopping itineraries in season — ferries stop before airports do. Carry your medication in hand luggage; a two-day delay on an island is common and pharmacies are not.
Zika
A risk in the Philippines. Spread mainly by mosquito bite but also sexually, and it can cause serious birth defects.
Prevention If you are pregnant or planning a pregnancy, this deserves a conversation before you book rather than after.
Chikungunya
The Government of Canada names it as a risk. Fever and joint pain, which can persist well after the trip.
Prevention The same daytime mosquito precautions that cover dengue.
Traveller’s diarrhoea
Contaminated food, water and ice. More likely on longer provincial stays than in a Manila hotel.
Prevention Bottled or boiled water, ice you trust, food cooked fresh and hot. Rehydration salts weigh nothing and we can send you with a standby antibiotic where it is appropriate.
The sea
Diving, snorkelling and small boats are why many people come. Coral cuts get infected quickly in warm water, and the nearest chamber can be a long way from the nearest island.
Prevention Clean and cover every scrape properly. Check your travel insurance actually covers diving to the depth you plan. Tell us if you are diving — it changes which malaria tablet we would choose.