Ochita kafukufuku National Institutes of Health (NIH) adapeza kudalira kwambiri kwa thupi masana m'ma 80s. Kafukufuku wawo adatsimikizira kuti kusowa kwa kuwala m'nyengo yozizira kungayambitse matenda a maganizo. Kuwala kumalepheretsa kutulutsa kwa melatonin, timadzi ta kugona, komanso kumathandizira kutulutsa kwa serotonin, timadzi timene timagwira ntchito motsutsana ndi kupsinjika maganizo. 

Masiku ano, oposa 18% a anthu a ku Quebec ndi oposa 15% a anthu a ku France amavutika ndi nyengo yozizira, yomwe zizindikiro zikapitirira, zimatha kukhala kuvutika maganizo kwa nyengo.

Zizindikiro za blues yozizira zimapangitsa moyo wa tsiku ndi tsiku kukhala wowawa kwambiri. Kutopa, kusowa chidwi, chizolowezi chodzitsekera, ulesi, kukhumudwa, kukhumudwa komanso kunyong'onyeka zimamveka… koma sizingathetsedwe. Dziwani za upangiri wathu kuti muthane ndi zovuta zazing'ono zam'nyengo yozizira.