potential oxygen shortage in hard-hit southern hospitals where intensive care units are packed with covid patients. as cnn s athena jones reports for us, this comes amid worries the virus spreading in cools and during the labor day travel rush. reporter: this labor day weekend, the message from federal health officials is clear. first and foremost, if you are unvaccinated we would recommend not traveling. reporter: and given the surge in covid-19 infections, the u.s. now averaging more than 160,000 new cases a day. the cdc says even those who are vaccinated should take precautions. u.s. air travel hitting a 15-week low tuesday according to the tsa. travel experts citing covid concerns. with more than 101,000 people hospitalized nationwide, the biden administration now closely monitoring oxygen supplies. hospitalizations in georgia up tenfold since the beginning of july. idaho s governor warning his state has only a handful of