Regeneron Pharmaceuticals, Inc. REGN announced that its phase III outcomes trial on REGEN-COV (casirivimab with imdevimab) in high-risk non-hospitalized COVID-19 patients was successful.The study evaluated the company’s investigational cocktail antibody, REGEN-COV, in infected non-hospitalized patients (n=4,567).The study met its primary endpoint, showing that the investigational REGEN-COV significantly reduced the risk of hospitalization or death by 70% (1,200 mg intravenous [IV]) and 71% (2,400 mg IV) compared to placebo. REGEN-COV also met all secondary endpoints in the phase III outcomes trial, including the ability to reduce symptom duration.Separately, a companion dose-ranging phase II study of 803 outpatient COVID-19 patients was conducted to evaluate the antiviral effect of several different REGEN-COV doses (IV: 2,400 mg, 1,200 mg, 600 mg and 300 mg; SC: 1,200 mg and 600 mg). All tested doses met the primary endpoint, rapidly and significantly reducing patients' viral load. Each dose demonstrated similar efficacy, including the lowest doses tested (IV: 300 mg; SC: 600 mg).Based on these encouraging data, Regeneron will share new data with regulatory authorities immediately and request that a lower 1,200 mg dose be added to the Emergency Use Authorization.These phase III data will also form the basis for a full Biologics License Application.We remind investors that REGEN-COV received an EUA from the FDA in November 2020 for the treatment of mild-to-moderate COVID-19 in adults as well as pediatric patients at least 12 years of age and weighing at least 40 kg, who have received positive results of direct SARS-CoV-2 viral testing and are at high risk for progressing to severe COVID-19 and/or hospitalization.Regeneron’s shares have gained 3.8% in the past year compared with the industry’s growth of 18.5%. Data published earlier also showed that the REGEN-COV antibody cocktail is effective against the SARS-CoV-2 variants.Regeneron has a collaboration agreement with Roche RHHBY for REGEN-COV outside the United States.Given the alarming levels of the spread and severity of the pandemic, quite a few pharma/biotechs are developing antibodies or evaluating their approved drugs or pipeline candidates to determine if they are effective enough to treat the infected patients. The emerging new strains pose a greater threat.Earlier, Vir Biotechnology, Inc. VIR and partner GlaxoSmithKline plc GSK announced that an Independent Data Monitoring Committee (IDMC) has recommended that its late-stage study evaluating VIR-7831 (GSK4182136) as monotherapy for the early treatment of COVID-19 in adults at high risk of hospitalization should pause enrollment due to evidence of profound efficacy.Regeneron currently carries a Zacks Rank #3 (Hold). You can see the complete list of today’s Zacks #1 Rank (Strong Buy) stocks here.Time to Invest in Legal MarijuanaIf you’re looking for big gains, there couldn’t be a better time to get in on a young industry primed to skyrocket from $17.7 billion back in 2019 to an expected $73.6 billion by 2027.After a clean sweep of 6 election referendums in 5 states, pot is now legal in 36 states plus D.C. Federal legalization is expected soon and that could be a still greater bonanza for investors. Even before the latest wave of legalization, Zacks Investment Research has recommended pot stocks that have shot up as high as +285.9%You’re invited to check out Zacks’ Marijuana Moneymakers: An Investor’s Guide. It features a timely Watch List of pot stocks and ETFs with exceptional growth potential.Today, Download Marijuana Moneymakers FREE >>Want the latest recommendations from Zacks Investment Research? Today, you can download 7 Best Stocks for the Next 30 Days. Click to get this free report Regeneron Pharmaceuticals, Inc. (REGN): Free Stock Analysis Report Roche Holding AG (RHHBY): Get Free Report GlaxoSmithKline plc (GSK): Get Free Report Vir Biotechnology, Inc. (VIR): Free Stock Analysis Report To read this article on Zacks.com click here. Zacks Investment Research