a covid caution is back as people try to get away for the holiday weekend. the cdc is advising people who are unvaccinated not to travel. reporter: from street fairs to baseball, covid cautions are back. more mask requirements and fewer people taking that last weekend summer get away. by one estimate, at least 10% fewer americans are going anywhere this weekend compared to pre-pandemic 2019. we still need your help to stop the spread of germs and viruses. reporter: air travelers a bit more cautious. why wouldn t you be? it s serious, more contagious than the last version. there s reason to be concerned. reporter: in just the last week, more than 7,000 people have died of covid, most