CD40LG and Fulminant hepatitis: A previous study reported fulminant hepatitis (FH) patients among an apparently healthy Bangladeshi population, where 63.6% (n = 22) of the FH patients were positive for anti-HEV IgM and 7.3% (n = 273) were positive for anti-HEV IgM [97], suggesting that HEV infection is highly endemic in Bangladesh.