Anuradha Gupta, Deputy CEO of Gavi the Vaccine Alliance, will be looking after the Twitter account @Vaccines this week. Anuradha will be taking us on trip to Timor-Leste and Indonesia, where she will meet with Vaccine Alliance partners and immunisation champions. She has promised to share photos of how #vaccineswork there, and she will be happy to answer any questions you pose along the way. What are you waiting for? Follow along!