I received a flu shot. four days later, i developed high fever, chills and dyspnea. i know this is a dead vaccine, but i alsohave als. could it have been caused by als?

Unlikely: Glad you received your shot, as should protect against full-blown flu, and respiratory complications, especially with als. Your reactn. Is not uncommon, but has nothing to do with your als, and merely is a delayed autoimmune rxtn to the shot. Far better than the flu.

No: It is not secondary to the als. And, it is not secondary to the vaccine.

? Reaction: No.Als does not interact with this vaccine.Also a reaction 4 days later is unusual. This may be a coincidence.