Immune compromised people, who are by definition sick, are often advised to get vaccinations.
We forget sometimes what a flu vaccine is. They take several of the most likely strains for the coming year, and create a chemical mix containing immune stimulants and pieces (or in some cases weakened virus etc.) and then put this into the body so the immune system can react.
Please note that the two articles cited had different time frames. The abnormal ME responses might only show up later. One big issue for us is how long the vaccine protects us. Evidence is growing that we have a high B cell death rate, and possibly this includes memory cells. We are known to lose a vaccine response completely - we can lose all antibodies to a given pathogen. So for many of us a vaccine only has temporary benefit, and then only for a subset of circulating influenza virus. The real value from vaccines is if immunity is persistant. Then over years of vaccination to different strains you can pick up a suite of resistance. Yet what is the value if you lose that response? Its questionable.
Having said that I think that for some of us it might be a good idea to get vaccinated, especially those who are well enough to hold jobs. Even if it only increases protection for that one season its something. However for any of us who have ever had a bad reaction, why risk it?
Bye, Alex