The phrase "common flu" refers to the regular or usual type of flu that many people experience. It is different from other severe or uncommon types of flu. Full definition
And even if they were more dangerous than common flu strains, it would not make any difference because manufacturers kill the virus as part of the vaccine production process, notes the group. (sciencemag.org)
With all of these symptoms and extreme fatigue, loss of appetite is almost a given, and, according to Web MD, one of the most common flu symptoms. (romper.com)
Most infections are mild, though many dogs experience fever, vomiting, lethargy and other common flu like symptoms. (harborpinesveterinarycenter.com)