South American countries such as Argentina, Chile, Brazil, Paraguay, Peru, and Uruguay reported the detection of HPAIV H5N1 clade 2.3.4.4 b in domestic and wild birds for the first time in the region from the end of 2022 to the beginning of 2023. Human infections were reported for the first time in South America, Ecuador, and Chile. Since October 2022, the PREVIR-MCTI network, a Brazilian network...