@hopeful33250 and @johnjames, I am a Navy Vietnam vet but have no experience with Agent Orange but have seen information on symptoms of Agent Orange and fever and chills are listed. Also I'm not sure if @johnjames has seen the VA page on Parkinson's Disease and Agent Orange which has some resource links on it -- https://www.publichealth.va.gov/exposures/agentorange/conditions/parkinsonsdisease.asp

Agent Orange Symptoms and Effects - https://hadit.com/agent-orange-symptoms-and-effects/

Hope this helps.
John