Answer: Osteoporosis Paget's disease Muscular dystrophy
Explanation: In osteoporosis, bone tissue begins to wear and thin, causing weak and breakable bones.
In Paget’s disease, the bones grow larger than normal, thereby becoming weak and brittle.
Muscular dystrophy is a group of diseases in which muscles waste away, causing extreme weakness and sometimes immobility.
HIV or Human Immunodeficiency Virus is a viral infection, which directly attacks Leukocytes (white blood cells). Leukocytes are the cells responsible for fighting infections that break past the skin. If the infection is not controlled it can cause a range of disorder's which form a syndrome called AIDS or Acquired Immunodeficiency Disorder Syndrome. When this happen common infection for such thing as a common cold can turn lethal as the body is unable to fight pathogen's effectively.