Yes, it is unsafe to forgo flu immunization. Here is info on pregnancy & flu shots from the U.S. Centers for Disease Control. I found it by searching on MedlinePlus, the U.S. National Library of Medicine's consumer health website, my go-to website for trustworthy health info. As you can see, the flu vaccine is safe, and the likelihood of serious illness from contracting influenza is higher in pregnancy. (FYI: This is probably because the immune system is partially suppressed in pregnancy to protect the fetus, who, from the immune system's point of view, is foreign protein.)
All Times America/New_York
Please note that this Forum is intended to help women make informed decisions about their care. The content is not a substitute for medical advice.