Some simple ways for strengthening the immune system. The immune system protects humans from the harmful impacts of the environment and the attack of viruses, bacteria and fungi, thus keeping them healthy. According to Suc khoe & Doi song news site, the following simple things can help intensify the immune system. Having more fruits and vegetables Fruits and vegetables contain vitamin A, B-group vitamins, vitamins C and E, and antioxidants, which can help improve the immune system. It is recommended for an adult to consume 300 grams of vegetables and […]