 [ Symptoms ] i can not find 4 strain flu vaccine in columbus oh should we get high dose now or when will 4 strain vaccine be out  who offers the 4 strain flu vaccine [ Disease ] toenail fungus will not cause systemic symptoms but if your immune system is somewhat weak or challenged you would be more prone to getting a fungal infection this would be the only likely association if you feel poorly it is not due to the toenail issue