Currently the cases which have been spreading in the US:
- Outside the US: ranging to as high as 50% mortality rate. https://en.wikipedia.org/wiki/Influenza_A_virus_subtype_H5N1#Mortality
- Dairy workers in the US: dairy cattle are going through waves of infections. Luckily the infections in this case are not as severe or life-threatening for humans, but seem to be lethal in other animals. https://www.cidrap.umn.edu/avian-influenza-bird-flu/h5n1-avian-flu-isolate-dairy-worker-transmissible-lethal-animals
- Backyard poultry transmission increasingly common https://www.cdc.gov/bird-flu/situation-summary/data-map-commercial.html