7 month LO always cough and flu

My 7 month LO has been cough and sneezing for 1 week. Todsy I have to bring my son home from Infant Care cause he has wheezing sound and snort in green. So I use sterimar nasal spray baby on him with garlic and tumeric balm seems doesnt work. His milk intake also not so good. I feel so gulity mom cause my twins always sick.#advicepls #1stimemom