Malaria was suspected but, anxious not to let down the crew, he chose to stick it out until the end of the filming schedule.
Covered in insect bites, many of which were itchy and swollen, he had no idea he had been bitten by a sand fly, the insect that carries Leishmaniasis and which, despite its name, lives in the jungle trees of South America. No one knew what was wrong with me.' Ben dragged himself back to his training regime.
'The bad news is that you have a type called Subcutaneous Leishmaniasis (Vianna).' This causes ulcers at the site of the bite that don't heal.
'It can spread through the bloodstream or to the lymph nodes,' explains Professor Lockwood.
But I think it's important to face your fears and not just go for the comfortable option.