The battle of NCOV variants in the US has ended, when Delta defeated every opponent to become a dominant of only 3 months.

From the end of last year, a series of NCOV variants appeared in the US with different transmission properties.

After that, Delta appears.

However, Delta now almost defeated every other competitors.

A Covid-19 patient's treatment at Hospital in Baton Rouge City, Louisiana State on August 2.

Delta's rapid overwhelming in the race has made many scientists worry about what happened next.

Delta caused thousands of people to be hospitalized every day and threatened to pour the epidemic fruits of the President Joe Biden administration.

Epidemiologists expect 70-80% of the immunization population with natural immunity to create community immunity to pandemic control.

The way Delta is active stronger than other strains worrying.

Delta's appearance soon ended his dream of a free summer in the United States.

The scientific gender said that there are a number of factors that have caused Ca Delta to increase in the US.

After the CDC in May announced those who had full vaccinations without wearing a mask, many Americans once again behaved as if the virus had never existed.

What makes many scientists worrying is the increasingly dangerous transformation of NCOV.

Although there is no clear scientific evidence, many people working in hospitals for or transforming Delta seem to cause severe illness and faster.

Meanwhile, Emily L. Tull, a person who works at Coven-19 Patient Care Area at Willis-Knighton Medical Center in Shreveport, Louisiana, said Many Delta infections suffered kidney failure, liver damage

A CDC's internal document reveals last month indicating a number of studies in different countries that show people with higher risks of Delta with hospitalization.

A particle lying on the Western Rocky Mountains in Colorado is an example showing how Delta spreads quickly.

By the end of June, the Country Jam music festival opened.

At the beginning of August, the seed recorded nearly 900 cases of Delta infection.

The number of cases in the US is increasing with similar speeds.

The scientific gender said the infection cycle of the Delta strain, from the time of the virus infection until symptoms, also shortened to 2-3 days, instead of 5-6 days as before.

A Covid-19 test point in Brooklyn, New York, America on June 2.

The mutations of the Delta strain at first glance no noticeable compared to the mutation of other strains, as it does not avoid the immune system as in gamma and beta strains, according to scientists.

But P681R mutation can play a big role, causing Delta to become dangerous strains.

Most mutations are determined in worrying variants that seem to improve to make the key to match the locker, according to Vineet D. Menachery, the scientist researches the Corona virus at Texas Medical University Hospital

No one knows what the virus has any tricks.

Scientists are wondering when NCOV's ability to infect the top.

He thinks that this virus cannot continue mutating to spread forever.