Viral diseases cannot completely be healed while bacterial diseases can completely be healed.
They weaken body cells.
Explanation:
When we get a disease, the white blood cells try to fight it but when the disease is too strong and our immunity is low signs and symptoms show then when you take the medicine a persons immunity will be back and be able to fight the disease.
Cohesion is water sticking to water. adhesion is water sticking to another thing, think of it as you're adding something to the water molecules. add-hesion
Scientists need instruments to measure the world. Instruments and sensors are needed to collect data - that takes engineering to design and build them.
