The immune system recognizes and destroys substances that contain antigens. Your body's cells have proteins that are antigens. These include a group of antigens called HLA antigens. Your immune system learns to see these antigens as normal and usually does not react against them.
Mother's Day 2016. Need to know the exact date of Mothers Day this year? Here's a chart that shows what day Mother's Day is celebrated from 2014 - 2021. In the US, Mother's Day is celebrated on the second Sunday in May. In the UK, mothers are honored the fourth Sunday of Lent. Check out our fun Mother's Day Games and Activities for teachers!
1. Motherâs Day started as an anti-war movement. Anna Jarvis is most often credited with founding Mother's Day in the United States. Designated as the second Sunday in May by President Woodrow Wilson in 1914, aspects of that holiday have since spread overseas, sometimes mingling with local traditions. Jarvis took great pains to acquire and defend her role as âMother of Mother's Day,â and to focus the day on children celebrating their mothers.