The CDC has learned the new Delta variant seems to spread as easily as chickenpox and easier than many viruses, including the 1918 "Spanish" flu.

Enter your number to get our free mobile app

In a new memo, first obtained by the Washington Post, the CDC warns the COVID Delta variant spreads as easily as chickenpox. It's also more transmissible than MERS, SARS, Ebola, the common cold, seasonal flu, the the 1918 "Spanish" flu, and Smallpox, according to the CDC.

People infected with the Delta variant can spread it to about nine others and people who are vaccinated may spread it just as fast, officials say.

There's a greater risk of disease, hospitalization and death among those who are unvaccinated but vaccine breakthrough cases are expected, which may also reduce public confidence in vaccines, the CDC adds.

Vaccines prevent about 90 percent from getting a severe disease, but the vaccine appears to be less effective, under 90 percent, at preventing infection or transmission, officials say.

"The Delta variant of COVID -19 now accounts for about 1 in every 5 new coronavirus infections in the US. Health experts warn that regions where less than half the people are fully vaccinated could see infections surge this fall and winter, including many regions in New York State," the New York State Health Department wrote on Facebook.

CDC Director Dr. Rochelle Walensky confirmed the memo to CNN and said "extreme" measures are needed to get the new COVID outbreak under control.

"The measures we need to get this under control -- they're extreme. The measures you need are extreme," Walensky told CNN.

On Wednesday, one day after the CDC updated its mask guidance, Gov. Cuomo said "dramatic action" is needed to slow the spread of COVID in New York.

One county in the region is telling everyone to put the mask back on. Cuomo has yet to require New Yorkers to wear masks. He says officials are still looking at data adding, for now, local governments can make their own decisions.

Cuomo's staff have pinpointed 117 ZIP codes across New York where COVID is spreading more rapidly.

Gov. Cuomo once again said it's a "pandemic of unvaccinated" as 3.5 million New Yorkers, which is bigger than the population in 21 states, are not vaccinated.

On Wednesday, Gov. Cuomo announced there were 2,567 new COVID cases in the previous 24 hours. On June 28, there were 275 cases, an increase of over 700 percent.

According to Cuomo, 74.9 percent of all New Yorkers 18 and older have received at least one vaccine while 68.3 percent have completed their vaccine series. 62.7 percent of all eligible New Yorkers have at least one vaccine dose.

Keep Scrolling:

READ ON: See the States Where People Live the Longest

Stacker used data from the 2020 County Health Rankings to rank every state's average life expectancy from lowest to highest. The 2020 County Health Rankings values were calculated using mortality counts from the 2016-2018 National Center for Health Statistics. The U.S. Census 2019 American Community Survey and America's Health Rankings Senior Report 2019 data were also used to provide demographics on the senior population of each state and the state's rank on senior health care, respectively.

Read on to learn the average life expectancy in each state.

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.

Nearly 40 Children Have Gone Missing From the Hudson Valley

Highest-Rated Airbnb in New York Found in Hudson Valley

You won't have to leave the Hudson Valley if you want to enjoy New York's highest-rated Airbnb. 

38 'Most Wanted' in New York

Authorities across New York State, including the FBI, have identified these people as its "Most Wanted Fugitives." Officials ask for help in finding them but warn they should be considered "armed and dangerous."

LOOK: Here Are the 25 Best Places to Live in New York State

Stacker compiled a list of the best places to live in New York using data from Niche. Niche ranks places to live based on a variety of factors including cost of living, schools, health care, recreation, and weather. Cities, suburbs, and towns were included. Listings and images are from realtor.com.

On the list, there's a robust mix of offerings from great schools and nightlife to high walkability and public parks. Some areas have enjoyed rapid growth thanks to new businesses moving to the area, while others offer glimpses into area history with well-preserved architecture and museums. Keep reading to see if your hometown made the list.

Hidden Treasure Worth Thousands Found in New York Home