What inoculations do I need for a 2 week holiday in the Philippines?

What is the latest period I can start them?

Also is it absolutely essential that I take them? I will be staying in the northern region of Luzon.

Inoculations for overseas travellers are absolutely essential. There may be clinics in your area for these but your pharmacist or doctor can advise you on what kind.

If you are American, the US Department of State and the CDC have the following warnings.

Health Information for Travelers to Philippines - Traveler view | Travelers' Health | CDC

To tickle and Fr_Chuck. I just want to thank you very much for your response and for your advice. I will take that on board and check out the link on health information. Much appreciated.