Tonkopei Y, Skyba O. The methodological bases of health preventive work with children aged 6-7 who often get sick under the conditions of the covid-19 pandemic. TUW [Internet]. 2022 May 25 [cited 2024 Nov. 23];(1(34):15-20. Available from: https://journals.4science.ge/index.php/TUW/article/view/969