/ Christine Johnson Content for 51³Ô¹ÏºÚÁÏ Davis en /climate/blog/bird-flu-outbreak-among-ca-marine-mammals-remains-small-concerning <p><span>Scientists and wildlife specialists continue to sample and monitor marine mammals in California, where the first cases of highly pathogenic avian influenza (HPAI) H5N1 in a California marine mammal were detected and&nbsp;</span><a href="/health/news/first-cases-highly-pathogenic-avian-influenza-northern-elephant-seals-confirmed-california"><span>announced</span></a><span>&nbsp;last month in San Mateo County.&nbsp;</span></p> March 13, 2026 - 9:36am Katherine E Kerlin /climate/blog/bird-flu-outbreak-among-ca-marine-mammals-remains-small-concerning