Even with continued jostling inside the larger immuno-oncology space, the oncolytic virus (OV) approach may be more firmly staking its claim to drug-developer interest. Already this year, Johnson & Johnson inked a potentially massive deal to take over Benevir Biopharm Inc. The arrangement disclosed in early May brought the latter $140 million up front and up to $900 million in milestone payments. Rockville, Md.-based Benevir boasts a platform called T-Stealth, designed to engineer OVs to infect and destroy cancer cells.