Observatory: On August 13, every year, the world celebrates International Left Hand Day ("Left Consumers"), as Dean R. Campbell, founder of the International Hardness Organization, first celebrates it in 1976 to help raise awareness of the advantages and disadvantages of using the hands. to the left.
More susceptible to disease
Numerous studies have shown that left-handers may be more susceptible to disease, such as a 2013 Yale study that 40% of people with schizophrenia use the left hand and 11% of those diagnosed with mood disorders use the left hand. Business daily.
Left-handed consumers in the world represent only 10% of the population, but they include celebrities, most notably "former President of the United States, Barack Obama, famous artist, Leonardo da Vinci, actress, Drew Barrymore, actor, Tom Cruise, and footballer, Pele. "