The US is sprinting to develop a coronavirus vaccine or treatment. Here's how 10 top drugmakers are racing to tackle the pandemic.

· As the coronavirus outbreak has progressed into a pandemic, leading drugmakers are researching treatments and vaccines to stop the virus.
· The small biotech Moderna has leaped to the front of the race, with its vaccine candidate ready to begin testing in people. Pharma giants like Johnson & Johnson and Sanofi are also in...