Siyini isivinini somoya se-swallow engenalutho?
I-swallow yaseYurophu, enesisindo esiyi-grama engu-20 ngokwesilinganiso, ishaya amaphiko ayo izikhathi ezingu-12 ngomzuzwana, lokhu kuphumela esilinganisweni sejubane lomoya elingamamitha angu-9 ngomzuzwana, okucishe kube amamayela angu-20,1 ngehora.