![](https://i.guim.co.uk/img/media/449eb5bcb9be6bc96f4f7d26caeb9353773fa55f/0_21_3500_2100/master/3500.jpg?width=1200&height=630&quality=85&auto=format&fit=crop&overlay-align=bottom%2Cleft&overlay-width=100p&overlay-base64=L2ltZy9zdGF0aWMvb3ZlcmxheXMvdGctZGVmYXVsdC5wbmc&enable=upscale&s=197ed4da2a51ddd436613e6d53fec163)
Patients seriously affected by flu or Covid may have high levels of crucial enzyme, research finds
Some patients who fall seriously ill or die from common respiratory viruses have abnormally high levels of a crucial enzyme, new Australian-led research has found. The discovery may help provide part of the answer as to why otherwise healthy people …