What preparations do you need to make to go to an African country (Congo)?

Basically, you need to be vaccinated against yellow fever, but you don't need to be vaccinated against typhoid fever. The medical conditions there are not very good. Commonly used drugs are necessary, such as anti-inflammatory drugs, cold drugs, diarrhea drugs, trauma drugs and so on. Pay attention to the expiration date. As you said, it is best to consult a doctor about liver disease and what medicine to take. After all, the hospital conditions there are limited, and some diseases cannot be solved. In addition, mosquito nets and mosquito repellent drugs are also necessary. If you are bitten by a mosquito, you may tremble. In view of the fact that there are many medicines in this field, the rest is to pay attention to diet. The materials there are scarce, so I dare not say that the food is good, but I must eat enough and try not to be picky about food. I can also take some books to learn French. The local official language is French, so it doesn't hurt to learn something. Well, I wish you all the best.