German nutritionist Christina Eser said that the immune system can be strengthened through healthy nutrition, especially foods rich in vitamins and minerals.

Acer explained that zinc has an antioxidant effect, that is, it eliminates harmful particles, and it also has a positive effect on the growth and number of some immune cells.

The rich food sources of zinc are meat, seafood such as oysters, whole grain products, and chicken soup.

Vitamin "C" (C) plays a major role in strengthening the immune system, as it stimulates macrophage cells, which are one of the important weapons of the immune system in the face of diseases.

The food sources rich in vitamin "C" are citrus fruits such as oranges and tangerines, paprika, and berries.

Iron is of great importance for the immune system, as its deficiency causes a decrease in the number of immune cells and antibodies.

The body can better absorb iron from animal food sources such as red meat and fish, while plant sources such as legumes and whole grain products should be eaten with foods rich in vitamin "C" such as sweet pepper, to help the body absorb it better.