The response has echoes of the early days of 2020, when the coronavirus began its deadly march around the world. Today, some officials and experts express frustration that more livestock herds aren’t being tested for avian flu, and that when tests and epidemiological studies are conducted, results aren’t shared fast enough or with enough detail. They fear that the delays could allow the pathogen to move unchecked — and potentially acquire the genetic machinery needed to spread swiftly among people. One dairy worker in Texas has already fallen ill amid the outbreak, the second U.S. case ever of this type of bird flu.