DANFLU-2 RCT of 332 438 elderly (43 881 w/ diabetes) tested high (HD-IIV) vs standard dose SD-IIV) flu vaccine. HD-IIV signif. reduced cardioresp., CV, CHF, influenza, hospitalizations vs SD-IIV, irrespective of DM status. Similar results previously seen in a Canadian RA pop. https://t.co/GGZPThoHrs