to get the vaccine. i have a grandson that is not taking the vaccine, and we ve preached to him about it, but he s not taking the vaccine. reporter: your own grandson. my own grandson. he believes the stuff on the internet. reporter: tonight the delta variant is rattling the nerves from the white house to wall street with the dow tumbling 720 points, the worst decline in a year. two americas, the vaccinated and unvaccinated are coming into sharper focus here in ohio and across the country. ohio is fully vaccinated 45. 9% of the population below the u.s. rate of 46.6%. cincinnati is slightly higher at 49%. now we re in this stage where the supply is very high and the demand is very low. reporter: the long lines at vaccination centers in the winter and spring have slowed to a summertime trickle.