Harvard University study published Tuesday found periods of social distancing may be required for two years into 2022 in order to prevent future COVID-19 seasonal outbreaks from overwhelming the U.S. health care system, Newsweek reports.

Researchers at Harvard University’s T.H. Chan School of Public Health analyzed scenarios in which a surge of people sickened by the novel coronavirus could crush the country’s hospitals and intensive care medical workers. The analysis included variables on whether people infected with coronavirus have developed short-term (one year) or longer-term immunity against coming resurgences.

The researchers projected that a wintertime outbreak “will probably” occur after this Spring’s initial, “most severe” outbreak, and it’s possible critical care capacities will be overwhelmed and unable to provide treatment for new waves of positive patients.

The researchers acknowledged the massive economic hurt the COVID-19 pandemic has put on the United States and across the globe. They said their research, published Tuesday in the journal Science, does not endorse any particular policies, but instead considers the viability of alternative options into preventing a “catastrophic burden on the health care system.”

“Absent other interventions, a key metric for the success of social distancing is whether critical care capacities are exceeded. To avoid this, prolonged or intermittent social distancing may be necessary into 2022,” the Harvard School of Public Health researchers wrote in the analysis published this week.

“We projected that recurrent wintertime outbreaks of SARS-CoV-2 will probably occur after the initial, most severe pandemic wave,” the researchers continued. “Additional interventions, including expanded critical care capacity and an effective therapeutic, would improve the success of intermittent distancing and hasten the acquisition of herd immunity … Even in the event of apparent elimination, SARS-CoV-2 surveillance should be maintained since a resurgence in contagion could be possible as late as 2024.”

SARS-CoV-2 is the name of the virus which causes the COVID-19 disease.

The researchers noted that varying degrees of seasonal transmission and the continuation of it having low fatality rates will have a major effect. But they still cautioned that “experience from China, Italy and the United States demonstrates that COVID-19 can overwhelm even the health care capacities of well-resourced nations.”

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