Concerned and Confused About Storing Raw Chicken

The writer has food anxiety and is cautious about consuming meat, especially chicken, due to concerns about getting sick. They are confused about the safe storage time for raw chicken in the fridge after purchase. The USDA recommends using raw chicken within 1-2 days of purchase, but the writer's sister bought chicken with a sell-by date that suggests it's safe to use until 2/20 or 2/21. The sister plans to cook the chicken on 2/19, which would be 3 days after purchase, but it could have sat in the store for another day or two before that. The writer wonders if the USDA is being overly cautious with their 1-2 day guideline. They ask if it's safe to use raw chicken on the 3rd or 4th day after purchase, even if it's before the sell-by date. The writer is seeking clarification on the safe storage time for raw chicken. They are concerned about the potential risks of foodborne illness from consuming spoiled chicken. The writer's sister is also cautious about food safety, but not as much as the writer. The writer is looking for a clear answer to their question about the safe storage time for raw chicken.