There may be trouble ahead as dangerous Covid-19 variant appears to cause hospitalization spike in a Missouri city - CNN

Although the country is getting close, with 65.4% of adults having received at least one dose, demand and vaccination rates have declined, leaving experts to worry if enough of the population will be vaccinated in time to curb fall and winter surges.

Low vaccination rates are dangerous when combined with the spread of variants such as Delta, which is believed to be more transmissible and cause more serious illness.

More than 71% of those between 30 and 49 years would have been vaccinated with at least one dose by the same time, as well as nearly 86% of adults 50 to 64 years old and nearly 95% of seniors 65 and older, the study found.

Only about half of adults under the age of 30 said they had been vaccinated or plan to get vaccinated, another CDC study found, less than those between 30 and 34 years (55%) and those 35 to 39 years (53%).

The authors of the study said that "a desire to protect others and resume social activities were motivators to get vaccinated, suggesting that messages emphasizing that vaccination would allow them to resume social activities and encouraging vaccination for the greater good might be effective."

Celebrations still risk infections, study finds

Along with increasing vaccinations have come more reopenings and social gatherings, including weddings and birthday and holiday celebrations.

In many places, the reopenings have not inhibited progress on combating the pandemic.