Indirect impact of rotavirus vaccination on viral causes of acute gastroenteritis in the elderly

•Burden of rotavirus infection may be underestimated in the elderly.•Rotavirus was detected in 9 % of viral positive samples in those aged ≥65.•Rotavirus decreased after vaccination but continued to circulate in the elderly.•Circulating genotypes changed in those aged ≥65 after paediatric vaccination.•Rotavirus genotypes in outbreak and endemic settings are comparable.