<Table> <Tr> <Th_colspan="2"> Thalassemia </Th> </Tr> <Tr> <Th> Synonyms </Th> <Td> Thalassaemia, Mediterranean anemia </Td> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Td_colspan="2"> Peripheral blood film from a person with Delta Beta thalassemia </Td> </Tr> <Tr> <Th> Specialty </Th> <Td> Hematology </Td> </Tr> <Tr> <Th> Symptoms </Th> <Td> Feeling tired, pale skin, enlarged spleen, yellowish skin, dark urine </Td> </Tr> <Tr> <Th> Causes </Th> <Td> Genetic disorders (inherited) </Td> </Tr> <Tr> <Th> Diagnostic method </Th> <Td> Blood tests, genetic tests </Td> </Tr> <Tr> <Th> Treatment </Th> <Td> Blood transfusions, iron chelation, folic acid </Td> </Tr> <Tr> <Th> Frequency </Th> <Td> 280 million (2015) </Td> </Tr> <Tr> <Th> Deaths </Th> <Td> 16,800 (2015) </Td> </Tr> <Tr> <Td_colspan="2"> (edit on Wikidata) </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Thalassemia </Th> </Tr> <Tr> <Th> Synonyms </Th> <Td> Thalassaemia, Mediterranean anemia </Td> </Tr> <Tr> <Td_colspan="2"> Peripheral blood film from a person with Delta Beta thalassemia </Td> </Tr>

What geographical populations are typically affected by alpha vs beta thalassemia