The US hasn’t learned lessons from the Covid-19 pandemic that it could use to mitigate the threat of pathogens like H5N1 bird flu that keep showing signs of their own pandemic potential, health experts told CNN Friday.

The Centers for Disease Control and Prevention (CDC) has confirmed the first severe case of bird flu in the United States, noting it has shown a “concerning” mutation, leaving health experts to warn about the risk of another pandemic.

America is heading into an even higher-risk period as the seasonal flu begins to circulate. This also raises a question of whether a person be infected by both, the seasonal flu and the H5N1 or bird flu viruses.

The virus has spread among dairy cattle, humans and other mammals. But officials say the current public health risk is low.

The first severe case of H5N1 bird flu was confirmed in Louisiana. Here is a map of other states that have been affected.

The Centers for Disease Control and Prevention said Thursday that a single severe case of bird flu detected in a Louisiana man shows a rare mutation of the virus. The patient’s samples showed mutations in the hemagglutinin (HA) gene,