 Hello, I'm Claudia Hammond. Health Check is coming up after the news. And we'll be asking what the rest of the world can learn from India's experience of a heatwave which killed more than 100 people and led to over 40,000 suspected cases of heatstroke. And the single injection which can prevent you from contracting HIV for six months. With a new trial in Uganda and South Africa showing extremely promising results, questions are turning to how quickly it could be made available to the people who need it most.