Over the last 90 years antibiotics have been used to fight disease and increase growth rate of livestock, but this overuse has caused a new problem. Due to the constant use of antibiotics certain bacteria has become immune to it; these bacteria are called Nightmare Bacteria, they cannot be treated with antibiotics and have a high mortality rate.
CDC estimates that more than 400,000 U.S. residents become ill with infections caused by antibiotic-resistant food-borne bacteria every year, and at least 23,000 people die each year as a direct result of these infections.
In March 2015 people convince McDonald’s to stop serving chicken that used antibiotics. Then Tyson Foods, a McDonald's supplier, also committed to stop selling chickens that use antibiotics for growth. In October 2015 Subway, made a commitment to stop serving any meat raised on antibiotics, starting with chicken by the end of 2016.
More and more companies are joining the anti antibiotic movement.