At first, it was mostly countries who figured the coronavirus was poised to become endemic. Now companies are at it too.

Roche Holding AG, one of the world¡¯s biggest makers of diagnostic tests, said Thursday that COVID-19 will probably start to wane next quarter, meaning demand for its testing kits will taper off. Siemens Healthineers AG, a smaller rival lifted by the current testing boom, also pointed to a likely slowdown later this year. And Quest Diagnostics Inc. said it expects slipping test sales this year as the world adjusts to the virus¡¯s long-term presence.

¡°We believe that the positive signs, which we see on the horizon, are real,¡± Roche CEO Severin Schwan said about the virus¡¯s trajectory.