Human Immunodeficiency Virus -- this is HIV, the virus that causes AIDS.
Flu viruses. There are lots of different strains of flu virus, which is why new vaccines have to be made every year.
Cold virus. The common cold is caused by a virus.
Eukaryotic cells are cells with a nucleus while prokaryotic cells do not have a nucleus.
3 to seven days prior to sexual intercourse.
The commonly used instruments for basic medical examinations are:
Stethoscope- to hear the sound due to body movements such as breathing sound, heart beat and intestinal movement.
Stopwatch- To record pulse rate, respiration rate etc.
Weighing scale- measures the weight of the person
Thermometer- to measure the temperature of the body
Sphygmomanometer- This device measures the blood pressure of the person.
Medical halogen penlight- To see into eyes, test pupillary light reflex, etc.
Otoscope- Device to see the external ear cavity.
