covid vaccine trials next month. And if the company gets positive interim results from the large clinical trial, the US government could authorize emergency use of the company’s experimental Covid-19 vaccine in December, its chief executive said.Speaking during The Wall Street Journal’s annual Tech Live conference on Monday, Chief Executive Stephane Bancel said if sufficient interim results from the study takes longer to get, government authorization of the vaccine may not occur until early next year.US-based Moderna has one of the leading Covid-19 vaccines in development, along with a vaccine co-developed by Pfizer Inc and BioNTech.Last week, Pfizer Inc had said that it could file in late November for U.S.