From this information, which of the following are possible diagnoses? Tick all that apply.
Non-infective exacerbation of COPD - True, especially given his history of poorly-controlled COPD.
Viral illness - True.
Lung cancer - False, there is not enough information to suggest malignancy.
Symptomatic anaemia - True, given the haemodynamic instability.
Dehydration - True.