workers must be vaccinated. a new study shows young children are more likely to spread covid in their household than older children. for more covid developments, here is cnn amara walker. >> reporter: new fears that the kocovid-19 pandemic will only g worse. >> i will be surprised if we don't cross 200,000 cases a day in next couple of weeks. that's heartbreaking considering we never thought we would be back in that space again. >> reporter: the country averaged 200,000 cases day in january before covid-19 vaccinations for widely available. right now the u.s. is averaging about 131,000 cases a per day. one expert says he's concerned about rising infection rates across the country highlight georgia, the care liocarolinas, tennessee and illinois. >> i think the surge could sustain itself for another four to six weeks. >> reporter: hospitals