News & Perspective

Some products have shown promise, but efficacy varies across animal populations and more study is needed.

Many of the new cases are in the north, which has reported a late-season surge; elsewhere, Egypt has a new H5N1 case.

Also, Croatia reports its first high-path H5N5 outbreak in poultry.

H5N8 has now been confirmed in 40 countries, and South Korean scientists shared genetic findings from a recent H5N6 isolate.

Austrian officials said H5N8 had also been found in Croatia, which would raise the number of countries affected in Europe to five.