I am not so sure those long term effects (except those that lead to blood cloths) are real.
A quick duck duck go shows that these are the symptoms:
Tiredness or fatigue
Difficulty thinking or concentrating (sometimes referred to as “brain fog”)
Headache
Loss of smell or taste
Dizziness on standing
Fast-beating or pounding heart (also known as heart palpitations)
Chest pain
Difficulty breathing or shortness of breath
Cough
Joint or muscle pain
Depression or anxiety
Fever
Symptoms that get worse after physical or mental activities
Apart from the loss of smell, those are all things that are hard to quantify and could be something you are not aware of until you start looking for them. At which point you might become anexious and really start to notice them.