Serum antioxidant vitamins and respiratory morbidity and mortality: a pooled analysis.

Although this association did not quite reach statistical significance, our results support previous findings that have shown vitamin A to influence host response to influenza virus infection [ 43 ].

also in 679 other papers

Increased mortality was not observed in non-smokers (pooled aHR: 0.80, 95% CI: 0.50–1.28), but influenza/pneumonia mortality increased among smokers (pooled aHR: 1.75, 95% CI: 0.96–3.18), though the association remained marginally significant (Fig. 3 , Additional file 1 : Table S3).

also in 26,082 other papers

Lower serum vitamin A concentrations were associated with increased mortality from influenza/pneumonia (pooled aHR: 1.21, 95% CI: 0.99–1.48), though the association did not reach statistical significance (Fig. 2 A).

also in 111,027 other papers