By Lyric Li in The Washington Post, Aug 6, 2023 at 4:58 a.m. EDTBangladesh’s worst dengue fever outbreak on record has killed more than 300 people this year, overwhelming the country’s vulnerable medical system and prompting calls for a more coordinated response amid a spike in new cases. The mosquito-borne disease has claimed at least 303 lives and infected nearly 63,700 people across the South Asian nation, according to the latest government figures on Saturday,…