The latest figures from Twitter shows its number of users is stalling. It reported 320 million average monthly active users - the same number as the previous quarter. We hear from a technology entrepreneur Ben Way in San Francisco. Drug resistant infections will cause 10 million extra deaths a year and cost $100 trillion by 2050 - that's if the global increase in antibiotic use is not stopped. We hear from economist Jim O'Neil who is investigating alternatives to antibiotics. And South Korea abandons manufacturing enclave in North Korea.

(Photo: Lab testing Credit: SPL)