As they grow, babies use lipreading as part of speech and language development. This means that for infants who are in daycare settings, and therefore constantly seeing masked caregivers, "there may be some detrimental effects of at least extended exposure [to masks]," Lewkowicz said.
When people around infants in bilingual households wear masks it could present an even greater impairment, he said, because these children rely even more on lipreading to differentiate the phonetic sounds between the languages.
Seven Deadly Sins：
Wealth without work，Pleasure without conscience，Science without humanity，Knowledge without character，Politics without principle，Commerce without morality，Worship without sacrifice.
One more literally deadly: Eat without hunger :)
