No matter what kind of sample you collect, do not touch it with your hands or place it on a contaminated surface. This is especially important if you are collecting a  DNA sample from someone else because you could potentially contaminate the sample with your own DNA. Wash your hands before you begin and always wear gloves. If the collection involves a swab, tweezers, or clippers, these should be sterile, and you should avoid touching the part of the equipment that will come in contact with the specimen. Metal equipment can be sterilized with alcohol or by boiling in water. Kits will provide you with collection containers and instructions for storing it properly.  Paper envelopes are the best storage containers for most non-liquid samples. Do not store hair specimens or a damp buccal swab in plastic, as this will retain moisture and potentially damage the DNA. If storing the specimen in an envelope, do not lick the seal, as this could contaminate the sample. If you plan on storing the specimen for potential use in the future, label it with the name of the person from whom the specimen was collected, the date that it was collected, and the name of the person who collected it.  Keep your sample away from moisture, extreme temperatures, and chemicals. If you are using a DNA kit, the instructions will be very clear, so follow them closely. If you are mailing your sample to a lab but not using a kit, be sure to clarify shipping instructions.

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Write a summary of the previous text in Vietnamese:
Không chạm vào mẫu thử. Dùng dụng cụ vô trùng. Cất giữ mẫu thử trong vật đựng khô và sạch. Làm theo hướng dẫn đóng gói và vận chuyển.