My baby's health is not good as her age so please suggest how can we get to improve her health

A. it is important to give diet according to the need of the child which should contain proper amount of calorie and protein and at the same time kindly give plenty of water to drindk and seasonal fruits and vegetables. complete the pending vaccinations and this will help in improving the immunity of the child. food should be hofme made and avoid any type of packet foods follow the above points to increase immunity of the child and decrease the chances of the child getting ill