All 16 of the original Major League franchises (i.e., those in place when the first World Series was played in 1903) have won the World Series, with the longest wait for a franchise's first championship being for the Phillies (77 years, ending in 1980). Since expansion began in 1961, seven of the 14 expansion teams have never won the World Series. Further, one franchise (the Indians) has a current championship drought that pre-dates the expansion era. The three longest championship droughts in history were ended recently by the Red Sox (85 years, ending in 2004), the White Sox (87 years, ending in 2005), and the Cubs (107 years, ending in 2016). Discounting the 33 years in which there was no MLB franchise in Washington, there have been 60 seasons played in Washington since their last World Series championship (in 1924).

Can we conclude that is there any mlb team that hasn't won the world series?
yes