Experts are searching for reasons why Spain is struggling more than its neighbours. File photo

Not two months after battling back the coronavirus, Spain’s hospitals are beginning to see patients struggling to breathe returning to their wards.

The deployment of a military emergency brigade to set up a field hospital in Zaragoza this week is a grim reminder that Spain is far from claiming victory over the coronavirus that devastated the European country in March and April.

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Authorities said the field hospital is a precaution, but no one has forgotten scenes of hospitals filled to capacity and the daily death toll reaching over 900 fatalities a few months ago.

While an enhanced testing effort is revealing that a majority of the infected are asymptomatic and younger, making them less likely to need medical treatment, concern is increasing as hospitals begin to see more patients.

Spain’s hospitals are beginning to see patients struggling to breathe returning to their wards.

Experts are searching for reasons why Spain is struggling more than its neighbours after western Europe had won a degree of control over the pandemic.

But one thing is clear: The size of the second wave has depended on the response to the first one.

"The data don't lie,” Rafael Bengoa, the former health chief of Spain’s Basque Country region and international consultant on public health, told The Associated Press.

"The numbers are saying that where we had good local epidemiological tracking, like (in the rural northwest), things have gone well,” Bengoa said. "But in other parts of the country where obviously we did not have the sufficient local capacity to deal with outbreaks, we have community transmission again, and once you community transmission, things get out of hand.”

Bengoa is one of 20 Spanish epidemiologists and public health experts who recently called for an independent investigation in a letter published in the medical journal The Lancet to identify the weaknesses that have made Spain among the worst affected countries by the pandemic in Europe despite its robust universal health care system.

Except for teenagers and young adults, Spaniards largely comply with mandatory face mask rules. The health ministry also embarked on one of the world’s largest epidemiological surveys. Randomly testing over 60,000 people, it found the virus prevalence to be 5%, showing that the population was far from a "herd immunity.”

Spain leads Europe with 44,400 new cases confirmed over the past 14 days. File photo

However, Spain, with a population of 47 million, leads Europe with 44,400 new cases confirmed over the past 14 days, compared with just 4,700 new cases registered by Italy, with 60 million inhabitants, which was the first European country to be rocked by the virus.

Spain is still in good shape compared with many countries in the Americas, where the spread seems unchecked in the United States, Mexico and several South American countries.

But hospitalizations with COVID-19 have quintupled in Spain since early July, when cases were down to a trickle after a severe lockdown stopped a first wave of the virus that had pushed the health care system to breaking point.

On Tuesday, Spain’s ministry reported 805 people nationwide hospitalized over the past seven days. Half of the 64 people who died over the previous week were from Aragón, the region surrounding Zaragoza.

"There is no one single factor in such a pandemic,” said Manuel Franco, a professor of epidemiology at John Hopkins and Spain’s University of Alcalá, who also signed The Lancet letter.