This week cases of polio were reported in Syria, and suspected cholera cases in Yemen reached 100,000, showing two examples of how disease thrives amid conflict and tragedy. CNN looked into the methods governments around the world use to encourage vaccination, and Popular Science examined the possibility of making vaccines as contagious as the diseases they seek to prevent.

Doctors Raj Panjabi and Seth Berkley discussed the challenges of getting medicines – including vaccines – to people in the remotest parts of the world, and an innovative programme to deliver vaccines and other interventions by drone continued to make progress in Rwanda. Finally, the European commitment to polio eradication was reaffirmed, and conversation around the need to finish the job reignited on Twitter, especially in advance of the Rotary convention in Atlanta, USA, which will focus on the polio endgame.