McNamara, L. A., Wiegand, R. E., Burke, R. M., Sharma, A. J., Sheppard, M., Adjemian, J., Ahmad, F. B., Anderson, R. N., Barbour, K. E., Binder, A. M., Dasgupta, S., Dee, D. L., Jones, E. S., Kriss, J. L., Lyons, B. C., McMorrow, M., Payne, D. C., Reses, H. E., Rodgers, L. E., … Schrag, S. J. (2021). Estimating the early impact of the US COVID-19 vaccination programme on COVID-19 cases, emergency department visits, hospital admissions, and deaths among adults aged 65 years and older: An ecological analysis of national surveillance data. The Lancet, 0(0). https://doi.org/10.1016/S0140-6736(21)02226-1