 [ Symptoms ] yesterday and today i noticed small traces of brownish blood in my underwear and when i go to the bathroom im 22 years old my boyfriend and we use condoms my last period was almost 2 weeks ago i havent experienced any pain or discomfort [ Disease ] those who should avoid the flu vaccine include people with a history of allergic reactions to chicken eggs those with a history of hypersensitivity to the vaccine infants less than six months of age those with recent febrile having fever illness although you can be vaccinated if you have a cold or other mild illness without fever people who are known to have developed the rare nerve disease guillain barré syndrome gbs should avoid being vaccinated within six weeks of a previous vaccination