What can be used in a child who often suffers from strep throat?

You did not specify what specific supplement you are already giving to your child. To minimize the risk of further infections, it is worth taking care of the child's immunity. You can implement preparations with vitamin D3, fish oil or supplements supporting the natural bacterial flora of the respiratory tract. These funds can be purchased in pharmacies without a prescription. Here you can compare the prices of sample preparations and make an order with home delivery or collection at the pharmacy. Vitamin D3, e.g. https://www.gdziepolek.pl/produkty/113700/juvit-kids-d3-krople/apteki https://www.gdziepolek.pl/produkty/82436/vigantol-krople/apteki Fish oil, e.g. https://www.gdziepolek.pl/produkty/97542/mollers-tran-norweski-o-aromacie-cytrynowym-plyn/apteki https://www.gdziepolek.pl/produkty/112232/domowa-apteczka-tran-z-rekina-o-smaku-malinowym-plyn/apteki Supplement with beneficial bacteria, e.g. https://www.gdziepolek.pl/produkty/27304/entitis-smak-truskawkowy-pastylki-lamelki-zelki/apteki https://www.gdziepolek.pl/produkty/89462/entitis-baby-smak-bananowy-proszek/apteki I encourage you to read our article, where we suggest how to support the child's immunity: https://www.gdziepolek.pl/artykuly/jak-wzmocnic-odpornosc-u-dziecka-przed-pojsciem-do-szkoly and to analyze fish oil for children: https://www.gdziepolek.pl/artykuly/jaki-tran-dla-dziecka-wybrac-analiza I encourage you to watch our short film: