Hansoh Healthtech Co. Ltd., part of Jiangsu Hansoh Pharmaceutical Group Co. Ltd., has acquired exclusive worldwide rights to develop and commercialize an oral SARS-CoV-2 3C-like protease inhibitor from Beijing Huayi Health Drug Discovery Institute, also known as the Global Health Drug Discovery Institute (GHDDI). The deal includes ¥12 million (US$1.8 million) up front and up to ¥1.68 billion in potential milestone payments, plus tiered royalties on net sales.

The first randomized placebo-controlled trial assessing the effectiveness of the antiviral drug Tpoxx (tecovirimat) in treating monkeypox has begun in the U.K., with the first patients enrolled on Aug. 21.

It’s a step forward and a step back at Pfizer Inc. Even as Pfizer and its partner Biontech SE finished filing an emergency use authorization application with the U.S. FDA seeking to field an updated booster dose of their omicron COVID vaccine, the regulator has made a request of its own, for more data on the company's oral antiviral, Paxlovid (nirmatrelvir + ritonavir), for treating COVID-19. An Aug. 5, 2022, letter from the FDA stipulates post-EUA requirements for Paxlovid, including that Pfizer conduct a trial in patients with a relapse of COVID symptoms, longhand for a “rebound,” after an initial Paxlovid treatment course.

After declarations from the World Health Organization and the U.S. government that monkeypox is a public health emergency, attention is turning to the pharma industry’s response to the disease. Vaccines look likely to play a crucial role in controlling monkeypox – but could antivirals play a significant part as they did in the COVID-19 pandemic?

Following the readout of a phase II trial evaluating its COVID-19 oral antiviral Pentarlandir (SNB-01), Taiwan’s Syneurx International Corp. said it expects to launch a phase III test of the candidate in the next few months.

An expert panel of Japan’s Ministry of Health, Labour and Welfare (MHLW) pushed back on recommending conditional approval for a second time for Shionogi & Co. Ltd.’s orally administered COVID-19 antiviral 3CL protease inhibitor, S-217622, also known as ensitrelvir.

Respiratory syncytial virus (RSV) continues to be a tough indication. Enanta Pharmaceuticals Inc.’s phase IIb study of otherwise healthy adults treated with EDP-938, an N-protein inhibitor, missed its primary endpoint of reduction in total symptom score compared to placebo. It also missed the study’s secondary antiviral endpoints.

Within just a few hours, Molecular Partners AG reported both a potential snag in securing emergency use authorization (EUA) for its Darpin antiviral, ensovibep, and the loss of a half-billion-dollar partnership with Amgen Inc. for the phase I-stage 4-1BB-targeting compound MP-0310. While neither update is likely to dampen prospects for the company’s overall Darpin pipeline, the near-term investor disappointment was enough to send shares (NASDAQ:MOLN) closing 37% lower April 27, after dropping to their lowest point since the Zurich, Switzerland-based firm priced its $63.8 million IPO on Nasdaq in June 2021.

The Gates Foundation is joining with other philanthropic funders in launching an initiative to develop small-molecule antiviral drugs to lay in as part of preparations for the next pandemic.