PRO Cheerleader Gets A Swine Flu Shot & Now She Can Only Walk Backwards! Experts claim serious side effects of flu shots amount to about one in a million - well this is what that one in a million looks like. This has freaked me out enough to bypass flu shots in the future. But what do I know - to each their own. A 25 year old woman in Ashburn, Virginia has come down with a severe debilitating neurological disorder days after receiving a seasonal flu vaccination.