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Deprecated: Implicit conversion from float 269.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Cell+Rep+Med 2021 ; 2 (7): 100327 Nephropedia Template TP
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Young infants exhibit robust functional antibody responses and restrained IFN-gamma production to SARS-CoV-2 #MMPMID34124701
Goenka A; Halliday A; Gregorova M; Milodowski E; Thomas A; Williamson MK; Baum H; Oliver E; Long AE; Knezevic L; Williams AJK; Lampasona V; Piemonti L; Gupta K; Di Bartolo N; Berger I; Toye AM; Vipond B; Muir P; Bernatoniene J; Bailey M; Gillespie KM; Davidson AD; Wooldridge L; Rivino L; Finn A
Cell Rep Med 2021[Jul]; 2 (7): 100327 PMID34124701show ga
Severe COVID-19 appears rare in children. This is unexpected, especially in young infants, who are vulnerable to severe disease caused by other respiratory viruses. We evaluate convalescent immune responses in 4 infants under 3 months old with confirmed COVID-19 who presented with mild febrile illness, alongside their parents, and adult controls recovered from confirmed COVID-19. Although not statistically significant, compared to seropositive adults, infants have high serum levels of IgG and IgA to SARS-CoV-2 spike protein, with a corresponding functional ability to block SARS-CoV-2 cellular entry. Infants also exhibit robust saliva anti-spike IgG and IgA responses. Spike-specific IFN-gamma production by infant peripheral blood mononuclear cells appears restrained, but the frequency of spike-specific IFN-gamma- and/or TNF-alpha-producing T cells is comparable between infants and adults. On principal-component analysis, infant immune responses appear distinct from their parents. Robust functional antibody responses alongside restrained IFN-gamma production may help protect infants from severe COVID-19.