The past week has been low-key for the biotech sector with a few important pipeline and regulatory updates. Drug approvals were also in focus.Recap of the Week’s Most Important Stories: Regeneron Announces Positive Data on Dupixent: Regeneron Pharmaceuticals, Inc. REGN and partner Sanofi SNY announced positive results from a study evaluating dermatitis drug Dupixent (dupilumab) for the treatment of moderate-to-severe atopic dermatitis or eczema in children aged six months to five years. Patients received Dupixent every four weeks (200 mg or 300 mg, based on body weight) plus topical corticosteroids (TCS) or placebo. The study trial met its primary and all secondary endpoints as results showed that Dupixent when added to standard-of-care TCS significantly reduced overall disease severity and improved skin clearance, itch and health-related quality of life measures at 16 weeks compared to TCS alone (placebo). Dupixent rapidly improved symptoms after the first dose, improving itch in one week and clearing skin in two weeks. Dupixent plus TCS reduced overall disease severity by 70% and itch by 49%. Dupixent is currently approved in the United States and Europe other countries around the world for the treatment of specific patients with moderate-to-severe atopic dermatitis, as well as certain patients with asthma in different age populations.Regeneron currently sports a Zacks Rank #1 (Strong Buy). You can see the complete list of today’s Zacks #1 Rank stocks here.Incyte Gets Approval for Lymphoma Drug: Incyte INCY and partner MorphoSys AG MOR obtained approval from the European Commission for tafasitamab under the brand name Minjuvi. The drug has been approved in combination with Revlimid (lenalidomide) followed by Minjuvi monotherapy for the treatment of adult patients with relapsed or refractory diffuse large B-cell lymphoma ("DLBCL") who are not eligible for autologous stem cell transplant ("ASCT"). Approval was in the cards as the European Medicines Agency’s Committee for Medicinal Products for Human Use recommended the conditional marketing authorization of Minjuvi in June 2021. The conditional approval is based on positive results from the L-MIND study evaluating the safety and efficacy of Minjuvi in combination with Revlimid as a treatment for patients with relapsed or refractory DLBCL who are not eligible for ASCT. While Incyte has exclusive commercialization rights to tafasitamab outside the United States, both the companies co-market the drug under the brand name Monjuvi in the United States.Cassava Slides on Quanterix’s Statement: Shares of Cassava Sciences, Inc. SAVA plunged after Quanterix Corporation, a company digitizing biomarker analysis, stated that neither it nor its employees interpreted the test results or prepared the data charts presented by Cassava at the Alzheimer’s Association International Conference in July 2021 or otherwise. The company is developing simufilam for the treatment of Alzheimer’s disease (AD). The test results in question are plasma p-tau analysis from a previously disclosed randomized, controlled phase IIb study in patients with AD. The phase IIb study was conducted by Cassava. In response, Cassava stated that Quanterix’s sole responsibility with regard to this clinical study was to perform sample testing, specifically to measure levels of p-tau in plasma samples collected from study subjects. Per the company, it is the norm of the industry to separate the people who generate the data from the people who analyze the data. It further added that Quanterix’s employees did not know whether the samples were from placebo, or simufilam-treated patients. It conducted sample testing and then sent raw data to Cassava for analysis of treatment effects.AC Immune Surges on Study Results: Shares of clinical-stage biopharmaceutical company, AC Immune SA ACIU surged after it announced that partner Roche informed it that a mid-stage study evaluating the safety and efficacy of the investigational anti-tau monoclonal antibody, semorinemab, in mild-to-moderate AD, met one of its co-primary endpoints. Top-line data from the placebo-controlled phase II study, Lauriet, showed that semorinemab demonstrated a statistically significant reduction in cognitive decline from baseline by 43.6% compared to placebos measured by the Alzheimer’s Disease Assessment Scale, Cognitive Subscale, 11-item Version (ADAS-Cog11) at week 49 in patients with mild-to-moderate AD. However, the second co-primary endpoint, Alzheimer’s Disease Cooperative Study-Activities of Daily Living (ADCS-ADL), was not met. Per Roche, the open-label portion of the study will continue as planned.RedHill Biopharma Releases Data on Opaganib: RedHill Biopharma RDHL announced positive preliminary results from a new preclinical study on opaganib. The candidate was studied in a 3D tissue model of human bronchial epithelial cells to evaluate the in vitro efficacy of opaganib in inhibiting the Delta variant. Opaganib demonstrated strong inhibition of COVID-19 Delta variant in a human bronchial epithelial cells model, adding to prior data demonstrating potent inhibition of all COVID-19 variants tested to date. The global 475-patient phase II/III study with opaganib oral pill in hospitalized COVID-19 patients has completed treatment and follow up phase, with top-line results expected shortly.PerformanceImage Source: Zacks Investment ResearchThe Nasdaq Biotechnology Index has gained 0.54% in the past five trading sessions. Among the biotech giants, Incyte has gained 1.26% during the period. Over the past six months, shares of Moderna have soared 139.32%. (See the last biotech stock roundup here: Biotech Stock Roundup: REGN, MRNA Offer COVID-19 Updates, TBPH Down on Study Update).Medical - Biomedical and Genetics Industry 5YR % Return Medical - Biomedical and Genetics Industry 5YR % ReturnWhat's Next in Biotech?Stay tuned for more pipeline and regulatory updates. Infrastructure Stock Boom to Sweep America A massive push to rebuild the crumbling U.S. infrastructure will soon be underway. It’s bipartisan, urgent, and inevitable. Trillions will be spent. Fortunes will be made. The only question is “Will you get into the right stocks early when their growth potential is greatest?” Zacks has released a Special Report to help you do just that, and today it’s free. Discover 7 special companies that look to gain the most from construction and repair to roads, bridges, and buildings, plus cargo hauling and energy transformation on an almost unimaginable scale.Download FREE: How to Profit from Trillions on Spending for Infrastructure >>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 Sanofi (SNY): Free Stock Analysis Report Incyte Corporation (INCY): Free Stock Analysis Report Redhill Biopharma Ltd. (RDHL): Free Stock Analysis Report AC Immune SA (ACIU): Free Stock Analysis Report MorphoSys AG Unsponsored ADR (MOR): Free Stock Analysis Report Cassava Sciences, Inc. (SAVA): Free Stock Analysis Report To read this article on Zacks.com click here. Zacks Investment Research