Key points from article :
BBC's Tulip Mazumdar went inside Inovio's laboratory in San Diego.
Developing a new vaccine can take years.
Chinese authorities published the virus sequence online.
Designed the vaccine almost overnight.
Target DNA added to bacteria in plasmid manufacturing lab.
Product purified from the bacteria after incubation.
Preclinical testing starting this week.
Hope to start human testing by early summer.
Dr Kate Broderick heads up reseach & development.
