From peanuts and pollen to cats and dust mites, allergy rates are soaring dramatically all over the globe. Experts are predicting that by 2050, one in two will suffer from an allergy. Why are our immune systems overreacting in this way?
1976
2010
2002
2005
1968
1998
2001
2019
1992
2007
2009
2012
2006
1995
1987
1988