Dr. Ciaran Bannan:

This is the difficulty. We see patients with a constellation of symptoms. A very wide variety of symptoms have been reported by patients to date. Work has been done which shows that patients fall into particular clusters. Many patients may be quite achy and have muscular pains while others will be tormented by brain fog and difficulties with memory, concentration and finding words. Other patients have significant pulmonary issues either following admission to hospital or even without admission. These symptoms fluctuate over time. For some people, they will go away and be replaced by new symptoms. For the most part, people will recover over time but that recovery is very difficult to anticipate.