Worth mentioning is the fact that RBD-specific IgG1 induced by 3R-NC + KFDi.n maintained at the same level within 13 months, while that induced by 3R-NC + ALi.m displayed a decreasing trend.
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Nasal vaccination of triple-RBD scaffold protein with flagellin elicits long-term protection against SARS-CoV-2 variants including JN.1.
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