Long-term Real-world Protection Afforded by Third mRNA Doses Against Symptomatic Severe Acute Respiratory Syndrome Coronavirus 2 Infections, Coronavirus Disease 19-related Emergency Attendances and Hospitalizations Amongst Older Singaporeans During an Omicron XBB WaveLiang En Wee, Kelvin Bryan Tan, Calvin J. Chiew et al.|Clinical Infectious Diseases|2023Cited by 37