Gilead Sciences (NASDAQ: GILD) received a vote of confidence from the World Health Organization on Monday when a WHO official said that its experimental COVID-1) drug shows great potential. Bruce Aylward, assistant director-general of the World Health Organization, went on to say during a Beijing briefing that remdesivir seems to be the "one drug right now that we think may have efficacy." Shares of Gilead shot up by as much as 6.9% following the briefing. Image source: Getty Images. Remdesivir was originally developed to be an Ebola vaccine, but it proved less effective than was hoped against that disease. However, back in January, one COVID-19 patient who received remdesivir on a compassionate use basis saw a substantial improvement in symptoms. Since then, the Chinese government has started human trials with remdesivir, with WHO stating that clinical results would be available within weeks. Analyst expectations Although the COVID-19 epidemic is becoming a major worldwide issue, developing a treatment for it might not be all that lucrative. Geoff Meacham, an analyst at Bank of America, has said that remdesivir as a coronavirus treatment would have little long-term impact to Gilead's bottom line, at best bringing in $2.5 billion in one-time revenue for the biotech giant. There are 79,737 confirmed cases of COVID-19 so far, with 2,628 deaths. While the virus' spread within China seems to have slowed down, other countries have seen a surge in cases. Italy reported another 66 cases of the coronavirus Monday, news that sent European stock markets into a panic. 10 stocks we like better than Gilead SciencesWhen investing geniuses David and Tom Gardner have a stock tip, it can pay to listen. After all, the newsletter they have run for over a decade, Motley Fool Stock Advisor, has tripled the market.* David and Tom just revealed what they believe are the ten best stocks for investors to buy right now... and Gilead Sciences wasn't one of them! That's right -- they think these 10 stocks are even better buys. See the 10 stocks *Stock Advisor returns as of December 1, 2019 Mark Prvulovic has no position in any of the stocks mentioned. The Motley Fool owns shares of and recommends Gilead Sciences. The Motley Fool has a disclosure policy.Source