tl;dr Vaccines need to be kept at 2C-8C before they are used to be effective. This is a problem in Africa because power can be inconsistent and villages are re

tl;dr Vaccines need to be kept at 2C-8C before they are used to be effective. This is a problem in Africa because power can be inconsistent and villages are remote. Two improvements have been developed. MetaFridge is a new fridge that can keep vaccines cool for up to five days without power. It can also display how long the vaccines are still god for and transmit data to a service team if needed. Indigo is a new type of cooler that can be carried on your back. It works by heating it up which puts water into a high pressure compartment. This is sealed by a valve. Once the valve is flipped, the Indigo can keep the vaccines cool for up to 5 days with no ice or power. MetaFridge is in the field with a solar power option in the works. Indigo is in field trials with results suggesting 4x as many places can be reached.