Thandie Newton has revealed that she was struck with typhoid fever when she shot Half Of A Yellow Sun in Nigeria.
The 40-year-old actress, who plays Olanna in Biyi Bandele's big-screen adaptation of Chimamanda Ngozi Adichie's novel, admitted she didn't let the disease get in the way of the movie as she continued filming throughout.
"I got really, really sick. I had typhoid," she said.
"I had my jabs before I went but I obviously didn't have them done with enough time for them to be effective. It was terrible. But I just kept shooting. We could get medicine so it wasn't life threatening. It was a real lesson."
Thandie revealed how her co-star John Boyega had to be taken to hospital from their set in a Nigerian village - after his silicon earplugs melted inside his ear.
" It was 48C degrees heat, there's no air conditioning anywhere when we were shooting this massive scene with explosions. We're all sweating and ill," she said.
"Because of the explosions, we all had to wear these silicon earplugs, which mould to the inside of your ear. I t was so hot that the silicon earplug had melted deep into John's inner ear. He had to go to hospital - which is not simple: you have to get a car to a boat to the mainland. It's a big deal."
The Crash actress added: " We were in the most extreme situations you can imagine. We had to shoot without lights for days on end, and water would run out for days. There were sweat, blood and tears and it was all real. We managed to get the film made but we struggled."
The film, which premiered at the Toronto International Film Festival, is now looking for a UK distributor.