5cures for the plague in medieval times ?

Cooked onions

Arsenic

Sitting is sewers

Fumigating house with herbs

Crushed emeralds

Vinegar and water treatment
If a person gets the disease, they must be put to bed. They should be washed with vinegar and rose water

Lancing the buboes
The swellings associated with the Black Death should be cut open to allow the disease to leave the body. A mixture of tree resin, roots of white lilies and dried human excrement should be applied to the places where the body has been cut open. 

Bleeding
The disease must be in the blood. The veins leading to the heart should be cut open. This will allow the disease to leave the body. An ointment made of clay and violets should be applied to the place where the cuts have been made.

Diet
We should not eat food that goes off easily and smells badly such as meat, cheese and fish. Instead we should eat bread, fruit and vegetables 

Sanitation
The streets should be cleaned of all human and animal waste. It should be taken by a cart to a field outside of the village and burnt. All bodies should be buried in deep pits outside of the village and their clothes should also be burnt.

Pestilence medicine
Roast the shells of newly laid eggs. Ground the roasted shells into a powder. Chop up the leaves and petals of  marigold flowers. Put the egg shells and marigolds into a pot of good ale. Add treacle and warm over a fire. The patient should drink this mixture every morning and night.

Witchcraft
Place a live hen next to the swelling to draw out the pestilence from the body. To aid recovery you should drink a glass of your own urine twice a day.