“…As shown in Table 2, respiratory symptoms were evaluated in 22 studies (26,28,33,34,38,39,(45)(46)(47)(48)(49)(50)(51)(52)54,55,57,58,62,64,65,67), and the proportion of these was 23% (95% CI: 18-29%, I 2 =81%, P<0.01, Figure S1A). Nasal symptoms were evaluated in 17 studies (27,28,33,38,39,45,47,48,(52)(53)(54)(55)58,62,63,65,67), S2B).…”