这篇论文的题目是“Changes in population immunity against infection and severe disease from SARS-CoV-2 Omicron variants in the United States between December 2021 and November 2022”。在本文中，阐述的研究结果表明：感染过Omicron突变株+接种加强疫苗，对重症的预防有效性高于95%、即使到50周后，即一年以后，对预防感染Omicron的有效性仍达70%以上。而未感染Omicron只接种过加强针，重症的预防力为76%、对预防感染Omicron抵抗力仅20%
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