Moderna has already begun experimental testing on humans.
WHO has been working to expand access to potential vaccines and scale up production capacity.
UK now has 3 different types of vaccine under development with a total of 230 million doses.
BioNTech is in partnership with Pfizer to develop a coronavirus vaccine.
The news that a potentially successful COVID-19 vaccine was underway raised global investors’ optimism.
The results encouraged moving to a larger clinical trial to test if the vaccine is actually safe.