Rest during the day and do any necessary work at night. If they are not likely to be available. Use a pram or shopping trolley as transportation. Either find an empty house or building or prepare to set up camp elsewhere. Open sewers, contaminated water and the build up of rubbish all help to cause and spread disease.
Germs carried by rats, fleas and other insects, rapidly multiply.
All kinds of waste should be carefully disposed of and all the procedures described should be adapted to the doorstep situation. Wash with sand if there is no water available. Don't bite your nails however stressful conditions may be or put the fingers to the mouth. Don't pick scabs or sores and keep them covered. Change underclothes regularly and wash them.