Name at least 4 health risks in animals and humans linked to PFAS.

Per- and polyfluoroalkyl substances (PFAS) are a class of human-made chemicals that have been widely used in many consumer and industrial products. Here are at least 4 health risks in animals and humans linked to PFAS exposure:

1. Cancer: Several PFAS chemicals have been linked to certain types of cancer, including testicular and kidney cancer, as well as thyroid disease.

2. Reproductive Issues: Exposure to some PFAS has been associated with reduced fertility in men and women as well as delayed puberty onset and reduced hormone levels.

3. Immune System Effects: Some PFAS chemicals have been shown to reduce the effectiveness of vaccines and suppress immune function, which could result in increased susceptibility to infectious diseases.

4. Liver Damage: PFAS exposure has also been linked to liver damage and some of these chemicals may remain in the body for long periods of time, potentially causing chronic health problems.