Sanofi said on Tuesday it was working with the Biomedical Advanced Research and Development Authority (BARDA) of the U.S. Health Department to develop a vaccine against the new coronavirus from China. The French drugmaker said it intended to further investigate an advanced pre-clinical vaccine candidate previously developed against the SARS virus in the early 2000s, which it believes could protect against the latest coronavirus. At least a dozen drugmakers are working on vaccines or antivirals and other treatments to help those infected with the fast-spreading contagion. Johnson & Johnson said last week it was collaborating with BARDA to speed up development of a coronavirus vaccine.