The U.S. death toll from COVID-19 has surpassed 700,000.

Get our free mobile app

It's is a grim and frustrating milestone as the nation confronts a surge in infections and deaths driven by the delta variant and the refusal of millions of Americans to get vaccinated.

The last 100,000 deaths were recorded in just 3 1/2 months and occurred when vaccines were available to anyone over the age of 12 who wanted them.

That's deeply frustrating to doctors, public health officials and the American public because vaccinations overwhelmingly prevent deaths, hospitalizations and serious illness.

LOOK: Answers to 30 common COVID-19 vaccine questions

While much is still unknown about the coronavirus and the future, what is known is that the currently available vaccines have gone through all three trial phases and are safe and effective. It will be necessary for as many Americans as possible to be vaccinated in order to finally return to some level of pre-pandemic normalcy, and hopefully these 30 answers provided here will help readers get vaccinated as soon they are able.