World Leaders Pledge Billions For Coronavirus Vaccine

The European Union pledged €7.4 billion for COVID-19 vaccine research, falling slightly short of its €7.5 billion goal. The US and Russia did not participate, but the European Commission pledged $1 billion. Ursula von der Leyen emphasized the need for a global effort. The UK pledged $929 million and will host a GAVI summit. Boris Johnson highlighted the importance of collaboration to develop a vaccine.

What did British Prime Minister Boris Johnson emphasize regarding the fight against COVID-19?

What is the significance of the GAVI summit mentioned by Boris Johnson?