This article is part of a series of explainers on vaccine development and distribution. Learn more about vaccines – from how they work and how they’re made to ensuring safety and equitable access – in WHO’s Vaccines Explained series.

Deliveries of COVID-19 vaccines funded through the Gavi COVAX AMC to lower-income countries has begun.

Ghana is not only the first country to receive a shipment of COVAX vaccines, but it will be the first to broaden its reach by delivering them by drone. The new partnership with Zipline and UPS Foundation will see 2.5 million doses delivered this…

Even those that live in areas where the population has already been vaccinated would not be totally protected if the virus mutates elsewhere.

The first in a three-part series of blogs highlighting key lessons learned since the launch, four years ago, of the Cold Chain Equipment Optimization Platform (CCEOP), established by Gavi, the Vaccine Alliance, to ensure optimal cold chain…

Roald Dahl's daughter Olivia died of measles aged seven.

Minor side effects are a normal sign that the immune system is mounting a protective response following vaccination, although they aren’t universal.

Countries in the West Africa region are in a very different position to seven years ago. They now have the experience of the past as well as new tools to tackle Ebola.

COVAX announces 600,000 doses of the AstraZeneca/Oxford vaccine licensed to Serum Institute of India have arrived in Accra, Ghana; further deliveries to Abidjan, Cote d’Ivoire are expected this week.

Vaccine data from Scotland provides reassurance that the Oxford-AstraZeneca and Pfizer-BioNTech vaccines will significantly reduce hospitalisations and deaths from COVID-19 among older people after the first dose.

The continent is one of the most experienced regions in the world in dealing with disease outbreaks.

Maintaining antibodies in the blood requires creating certain long-lasting immune cells – but this doesn't always happen.