(CNN) As the US celebrated Memorial Day , health experts celebrated that more than half of the population was at least partially vaccinated -- but reminded the public there is work to still be done to keep the next holiday safe from Covid-19 as well. "It's great news that people can see their friends, they feel comfortable to travel because they're vaccinated," William Haseltine, former Harvard Medical School professor told CNN. "The bad news is if you are not vaccinated, you are still at risk, and your risk is about as high as it was before." And travel industry experts say this will likely be a busy summer. Any country that thinks the danger has passed is wrong, said World Health Organization Director-General Tedros Adhanom Ghebreyesus.

Source: CNN June 01, 2021 07:07 UTC