I am supplementing vitamin D3 and I still get sick. It is not a silver bullet for immunity.
Probably your kid has by the time you started supplementing just gone through the typically circulating virus strains and thus the viral loads in your kid don't replicate to levels that almost guarantee you being infected when interacting with them (like cuddling, comforting when they cry, etc.).
Probably your kid has by the time you started supplementing just gone through the typically circulating virus strains and thus the viral loads in your kid don't replicate to levels that almost guarantee you being infected when interacting with them (like cuddling, comforting when they cry, etc.).