American pharmaceutical company Modena has entered a large phase III clinical trial of the Corona 19 vaccine.

The test is conducted on 30,000 healthy subjects in 89 cities in the United States.

Modena's Phase 3 trial is the world's largest clinical trial of the Corona19 vaccine, where British pharmaceutical companies AstraZeneca and Chinese companies have begun small-scale phase 3 trials in Brazil and the United States, according to CNBC.

Modena says it will be able to create and distribute vaccines from 500 million doses a year up to 1 billion doses annually starting next year.