What is the full form of STD?

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    • Subscriber trunk dialing (STD, also known as subscriber toll dialing) is a term for a telephone system allowing subscribers to dial trunk calls without operator assistance. In India the term is commonly used to denote a call made to a number other than a local unit in India only. To make a STD call from a telephone in India a person has to prefix a STD code before the number to which he wish to dial. Each region/ city has a particular STD code assigned to it. Some of the common STD codes are: New Delhi- 011, Mumbai- 022, Kolkata- 033 and Chennai- 044.
    • Sexually transmitted diseases are illnesses that are transmitted between human being due to their sexual behaviors. It is also referred to as sexually transmitted infections (STI) and venereal diseases (VD). They can be transmitted due to any of the sexual activities including vaginal intercourse, oral sex and anal sex. The common causes of STD can be: 1. Bacterial 2. Fungal 3. Viral 4. Parasites 5. Protozoa One of the most well known STD is HIV infection which can ultimately lead to AIDS. The best way to prevent STDs is through proper vaccination and use of protections like condoms etc.

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