immune system
protects animals against diseases, infections and harsh weather conditions
protects cells that have not yet been infected by viruses
People build up resistance against some diseases and their immune system protects them against the disease in future infections.
White blood cells
it protects your body as no infections will get into you're blood
The ozone layer protects against sun's harmful rays. These are UV rays.
The Sixth Amendment protects the right not to confront your witnesses against you.
The Ninth Amendment protects against unreasonable disturbances. The Fourth Amendment protects against unreasonable searches.
Since Hepatitis B vaccine only protects against Hepatitis B, the only thing the vaccine controls is Hepatitis B infections.
Ozone layer protects against the UV rays. It is present as the ozone layer in stratosphere.
Skin protects the inside of the body from bacteria. If it weren't for skin, we would get infections way too easily and certainly would not be able to survive. Not only just bacteria, but from viruses, parasites, and fungi too. A substance called melanin protects your skin from burns.
A surge protector protects a system against lightening strikes but not against sags or blackouts. Line conditioners also called power conditioners protect your computer against sags and brownouts. The UPS protects your computer against blackouts ~TiffyQT