The Countdown to 2020: measuring progress in neglected tropical diseases.

The London Declaration on Neglected Tropical Diseases1 marked its fourth year on Jan 30, 2016. The declaration represents a coordinate effort to control or eliminate ten of the neglected diseases by 2020, and has already led to important coordination and partnership, and mobilised considerable resources. Although the progress made so far is to be celebrated, now is the time to count down to 2020 and start monitoring the progress and trends towards achieving the control and elimination targets.