I would like to give multivitamins to my child who goes to daycare and is often sick?

Hello ma'am, thank you for your question!

There are no products, vitamins or supplements that have been shown to be effective or beneficial with respect to the immune system, in adults and children. 

Instead, look to non-pharmacological measures:

Finally, if your child is prone to colds, which is the case when attending daycare centers, I strongly suggest, as a maintenance and prevention measure, sinus hygiene with a saline solution such as Hydrasense or Sinus Rinse. This is the best option to prevent the accumulation of secretions. There is no maximum during the day, but it should be done at least 30 minutes before bedtime.

Hopefully I have been helpful, I remain available if there is anything

Tom Samaha, pharmacist

Unless there is a diagnosed deficiency, they will not provide any benefit.

Iron deficiencies are very rare considering the availability of iron in a variety of foods. In addition a prescription is required for iron supplementation for children, following a medical evaluation and blood workup.