Raising chickens comes with built-in health risks for them and their keepers. In the United States, the CDC reports increased popularity of backyard poultry flocks has been associated with increases in live, poultry-associated salmonella outbreaks.
Arizona veterinarian Stephanie Lamb, a boarded specialist in avian medicine, discusses the ins and outs of salmonella in chickens, its residency, transmission and ways humans contract the virus.
Source: Hobby Farms, August 5, 2020. Link.
. . . just because a chicken has salmonella doesn’t mean that it will always be sickened by it themselves. Sometimes it is simply a carrier of the organism.”
Also see: Backyard chickens? Wash your hands. Don’t kiss chicks. Animal Health Digest, May 26, 2020. Link. 
. . . kids less than 5 years of age (and elderly people, pregnant women and people with compromised immune systems) should not have contact with young poultry.” – CDC