Although there is an abundant source of vaccines, many jealousy countries, the US vaccination campaign has leveled off and at risk of getting behind the world.

President Joe Biden is trying to call for Americans injecting Vaccine Covid-19 when the country's vaccination campaign slows down.

Vaccine supply is completely non-mattered in the US, where all over 12 people are eligible for vaccination.

America is currently behind neighboring Canadian countries in the proportion of vaccination population, as well as him, Italy and Germany.

One vaccine vaccination point in Austin, Texas in March. Photo: Texas Tribune.

The US has not reached a target of 70% of the population over 18 years of age injecting at least one dose that President Biden sets out on July 4.

The number of new NCOVs in the US doubled in the past month, according to the Centers for Disease Control and Prevention (CDC).

States in the south of America have the lowest vaccination rate, especially Mississippi and Louisiana, with less than 40% of the population injecting at least one nose.

The fact that the vaccine campaign has stopped in the southern states.

Data showed that in states like Mississippi, Alabama and Louisiana, about 80% of people over 65 were vaccinated, but with under 65, this rate was only 40%.

In mid-April, the US injections more than three million vaccines daily every day, but now dropped to 500,000 nases.

Experts think that many young and healthy people in the US do not feel the vaccination is one of the causes.

Some raise concerns about safety, and say that they may be vaccinated when they are officially approved by the Food and Drug Administration (FDA), instead of emergency use license

The three current types of vaccines in the US, including Pfizer, Moderna and Johnson & Johnson, have not been officially licensed by FDA, but only approved for emergencies.

About 20% of the population refuses from the vaccine.

A group of Vaccine protests in New York City last month.

The Biden administration argues that borrowing information on the network causes a situation of vaccination.

Many false information and conspiracy theory are spreading online in the past time, as the government transports the ultra-small chip into the vaccine to monitor the injection.

Many polls also showed that the views on vaccines were also affected by party factors, with nearly 30% of the republics denying the vaccine, higher than nearly 8 compared to the 4% ratio of the Democratic Party.

Professor Hoetz said that this is the biggest reason that many Americans refuse the vaccine.

In addition to the above reasons, experts add that accessibility issues of vaccine is also the barrier of the US vaccination campaign.

Although the supply is not a problem, there are still many people facing obstacles as unable to take to take injecting, lack of transportation or worrying about vaccination costs, Kates said.

The regulations of the federal government said Americans do not have to pay any vaccination costs, regardless of their immigration and health insurance.

Among nearly 333 million Americans, more than 186 million were injected at least one nose, of which nearly 162 million people completed the vaccination program, according to CDC.

In the past two weeks, the number of new infections, hospitalization and death in the US increased by 171%, 49% and 42% respectively, when the Delta transformation spreads strongly.