http://info.sjogrens.org/conquering-sjogrens/ask-the-expert-is-the-flu-shot-recommended-if-you-have-sjögrens

autoimmune disease like lupus. treated by plaquenil (aka hydroxychloroquine). check this out…

"The 21-week season was the longest in 10 years. CDC estimates that from October 1, 2018 through May 4, 2019, there have been 531,000– 647,000 flu-related hospitalizations and 36,400–61,200 flu deaths.

People with flu can spread it to others up to about 6 feet away. Most experts think that flu viruses spread mainly by droplets made when people with flu cough, sneeze or talk and less commonly from surfaces. People with flu are most contagious in the first 3 to 4 days after the illness began. Most healthy adults may be able to infect others beginning one day before symptoms develop and up to 5 to 7 days after becoming sick. Children and some people with weakened immune system may pass the virus for longer than 7 days.

Antiviral drugs can lessen symptoms and shorten the time you are sick by 1 or 2 days. They also can prevent serious flu complications, like pneumonia. For people at high risk of serious flu complications, treatment with antiviral drugs can mean the difference between milder or more serious illness possibly resulting in a hospital stay. CDC recommends prompt treatment for people who have influenza infection or suspected influenza infection and who are at high risk of serious flu complication."

AND

"A paper by Wahren-Herlenius and colleagues, published in 2017 addressed the effect of H1N1 flu vaccine in patients with Sjögren’s. Untreated Sjögren’s patients had an exaggerated response with higher IgG levels to H1N1 flu vaccine, hydroxychloroquine-treated patients did not show any exaggerated response.

To summarize, I strongly recommend inactivated injectable flu vaccines for Sjögren’s patients but caution is warranted when considering vaccination in non-treated Sjögren’s patients who have really active disease with multi-organ involvement. The patients on immunosuppressive medications (like prednisone, methotrexate, azathioprine, mycophenolate mofetil, rituximab) should not receive live attenuated influenza vaccine (the nasal spray flu vaccine).”

people on hydroxychloroquine receiving the flu shot did not show exaggerated symptoms like those with this autoimmune disease that were NOT on hydroxychloroquine. plus check out the 6 feet recommendation…FLU.