Reply to letter to editor by Yin et al.

Competing Interests: Declaration of competing interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: [GBC received honoraria from Seqirus, Viatris, Sanofi, GSK, Biontech, and Moderna. KA provided research support to the Robert Bosch Foundation – Research College Geriatrics, and Pfizer Pharma GmbH; provided consulting/expert support to Seqirus, GlaxoSmithKline GmbH & Co. KG, Pfizer Pharma GmbH, Sanofi-Pasteur, AstraZeneca; lecturing for Pfizer Pharma GmbH, Fa. MSD, Fa. Novartis, Fa. Daiichi-Sankyo, Fa. Bristol-Myers Squibb, Fa. Sanofi-Pasteur; holds honorary positions as speaker of the vaccination working group of the German Geriatrics Society e.V. (DGG e.V.) and member of the DRG project group of the Federal Geriatrics Association e.V. (BVG e.V.). BD participated in an advisory board for Seqirus. WK provided lecture activities to and participated in advisory boards for SPMSD, Seqirus, Pfizer, GSK, Biontech. SKJ is employed by Xcenda GmbH which received funding from Seqirus GmbH. STF provided lecture activities and consulting support to Biogen, Merck-Serono, GlaxoSmithKline, Sanofi-Aventis, Pfizer, Seqirus, Synlab, AstraZeneca, Roche, MSD, va-Q-tec, Bavarian Nordic, Janssen-Cilag, Alexion, Takeda, Biontech, MSD, Moderna.].