World Down Syndrome Day (WDSD) - March 21
March 22 , 2021
1255 days
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- It was declared by the United Nations General Assembly in 2011.
- The 21st day of March (the 3rd month of the year) was selected to signify the uniqueness of the triplication (trisomy) of the 21st chromosome
- Down syndrome is a genetic disorder caused by the presence of all or part of a third copy of chromosome 21.
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