It has been a bumpy rollercoaster ride for many biopharma companies throughout the pandemic, but overall, the 17 firms that make up BioWorld’s Infectious Disease Index are coming out ahead this year with stocks up by 44.8%.

Arbutus Biopharma Corp. this month gained the go-ahead from regulators to start a phase Ia/Ib trial with its oral capsid inhibitor, AB-836, for the treatment of chronic hepatitis B virus (HBV) infection, an event that drew more attention to the busy space and brought renewed speculation about RNAi bids against HBV, including Arbutus’ own.

Assembly Biosciences Inc., a company testing the limits of sustained virologic response in people with chronic hepatitis B virus infection after they discontinue treatment, said nearly all participants in an ongoing phase II study returned to having detectable viral loads after going off a regimen featuring the company's core inhibitor, vebicorvir.

The warning bells about the global threat of the rise of antimicrobial-resistant (AMR) infections and dearth of new antibiotics seem to have been ringing for several years now. However, the prospects of companies developing new antibiotics, buoyed by regulatory incentives and grant funding, should on the face of it be an attractive proposition for investors.