A month after the first wave of the Covid-19 pandemic took hold, pediatricians from all over Spain started to detect cases of a syndrome that was so strange that it didnât even have a name. It started to become clear at that time that the SARS-CoV-2 virus was causing serious illness above all else in the elderly and those with pre-existing medical conditions. That is why it was so strange to be finding children who, four to six weeks after having been infected with the coronavirus, would fall ill with continuous fever, general inflammation and other symptoms that put their lives at risk â despite having completely recovered from the initial infection.