(Dan Tri) – Thousands of schools in the US have postponed plans to reopen classes when the Omicron strain caused a record increase in Covid-19 cases.

A child in Seattle, USA was sampled for Covid-19 testing (Photo: AP).

The speed at which the Omicron mutation spread caused chaos across the United States in the first days of 2022.

According to Reuters statistics, the number of new Covid-19 cases in the US has doubled in the past 7 days, reaching a record average of 418,000 cases a day.

To date, more than 2,750 schools in the US have closed.

In New Jersey, which has had the highest case rate in recent weeks, most schools in the metropolitan area have implemented online classes, including Newark, the state’s largest city.

Some schools are using test results to avoid closures.

Similar efforts are underway in California, which pledged to provide free at-home testing kits to all 6 million public school students.

Some areas still decided to open schools as planned, including New York – one of the places heavily affected by the Covid-19 wave in the US this time.

New York City Mayor Eric Adams, who took office over the weekend, announced that he will open the largest school system in the United States despite the strong spread of the virus.

`We want to make it clear: The safest place for children is school,` Mr. Adams said during a visit to an elementary school in the Bronx.

The full impact of the Omicron outbreak on US school systems will become clear next week, as parents and administrators struggle to implement changing guidelines.

The Covid-19 wave broke out again in the US as well as many countries around the world due to the appearance of Omicron, a virus strain with many unprecedented mutations.

The US is still the largest epidemic area in the world with more than 56.7 million infections, including more than 848,000 deaths from Covid-19.

The rate of children hospitalized with Covid-19 in the US reached an all-time high last week.

Health services, already exhausted after previous outbreaks, are at risk of being overloaded again due to the increasing number of Covid-19 cases in the US.