While flu season in most of the USA ends in late spring, in the Caribbean it's year-round, and in the Southern Hemisphere it's April through September.
(flu season in most of the USA; ends; in late spring) (it; 's; year-round; T:While flu season in most of the USA ends in late spring; L:in the Caribbean) (it; 's; April; T:through September; L:in the Southern Hemisphere)
flu season in most of the USA it it
ends 's 's
in late spring
year-round T:While flu season in most of the USA ends in late spring L:in the Caribbean
April T:through September L:in the Southern Hemisphere