Supplements don't always work. I take vit B6, 9 (folic acid) and 12, vit c, vit d every day and still had horrendous virus has not completely gone after over 2 weeks.
Were you more emotionally attached to one parent over the other ?
Mummy removed from museum due to lack of consent!

hope you feel better soon. Ps I’m asthmatic so I think that in my case that was why I caught everything I came into contact with