The following is a summary of "Early bacterial co-infections and ventilator-associated lower respiratory tract infections among intubated patients during the first and second COVID-19 waves: a ...

Upper respiratory tract infections affect the sinuses and throat and would include infections like the common cold and a sinus infection. Lower respiratory tract infections affect the airways and ...

most respiratory infections, especially those of the upper respiratory tract, are mild. Lower respiratory tract infections, particularly pneumonia, can be more severe. Lower respiratory tract ...