At his GP practice in south-west London, Dr Ziad Tukmachi has become increasingly concerned by the sheer number of patients arriving with prolonged symptoms from various respiratory infections.
Rhinovirus infection is associated with stimulating histamine-releasing factor (HRF) and HRF-reactive immunoglobulin E for increasing severity of asthma and exacerbations.
The tripledemic unfolding this winter is one of several odd trends among respiratory virus infections these last years. Viruses, it turns out, can block one another and take turns to dominate.