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What number of HIV Strains, Types, and Subtypes Are There?

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Human immunodeficiency infection (HIV) is an infection that assaults the safe framework. The Centers for Disease Control and Prevention (CDC) gauges that 1.2 millionTrusted Source individuals in the United States were living with HIV in 2018.

We regularly allude to HIV as a particular sort of infection, yet this is somewhat deceptive. These infections are entirely different.

HIV can be separated into two fundamental sorts: HIV-1 and HIV-2.

HIV-1 infections would then be able to be additionally sorted into various gatherings, subtypes, and strains.

While this may appear to be somewhat aggravating, don’t stress. Underneath, we’ll separate precisely how HIV is characterized, how testing works, and that’s just the beginning.

Types, gatherings, subtypes, and strains

How about we dive somewhat more profound into HIV order. We’ll do this by beginning with the two fundamental kinds of HIV and afterward separating each type further into gatherings and, where material, subtypes.


There are two distinct kinds of HIV. These are called HIV-1 and HIV-2. Despite the fact that they may have comparable names, these are really two particular sorts of infection. On a hereditary level, HIV-2 is in excess of 55% unique in relation to HIV-1.

Generally, HIV-1 is the dominant kind of HIV all through the world. It’s assessed that 95% of individuals who are living with HIV have HIV-1.

HIV-2 is predominantly found in western Africa. It doesn’t communicate starting with one individual then onto the next just as HIV-1, and it might likewise advance all the more gradually.

HIV-2 is likewise impervious to certain sorts of antiretroviral drugs, for example, non-nucleoside turn around transcriptase inhibitors (NNRTIs).


HIV-1 infections can be additionally arranged into four distinct gatherings. These are:

  • Bunch M
  • Bunch N
  • Bunch O
  • Bunch P

Out of the four gatherings, infections in Group M add to most HIV cases around the world. Indeed, the “M” in Group M means “major.”

Infections from the other three gatherings are considerably less normal. They’re by and large found in zones of focal and western Africa.

HIV-2 infections can likewise be isolated into nine distinct gatherings, which are assigned by the letters A through I. Gatherings An and D have all the earmarks of being the lone ones that are at present flowing in people.


HIV-1 infections inside Group M are separated considerably more into subtypes. These are gatherings of infections that are hereditarily unique in relation to one another. There are presently nine distinctive subtypes inside Group M:

  • Subtype A
  • Subtype B
  • Subtype C
  • Subtype D
  • Subtype F
  • Subtype G
  • Subtype H
  • Subtype J
  • Subtype K

Hereditarily talking, infections from various subtypes can contrast from one another by around 25 to 35 percent. Inside a subtype, there’s still variety also, however we’ll have more on that later.

With such a lot of variety, you might be contemplating whether the subtypes contrast by the way they cause infection or how they’re communicated. Specialists are presently striving to address these inquiries.

How normal are the distinctive subtypes?

The predominance of various subtypes can fluctuate all through the world. In general, the best variety of various subtypes can be found in western and focal Africa.

Subtype C is the most predominant subtype around the world. Between the long stretches of 2010 and 2015, Subtype C represented 46.6 percentTrusted Source of all HIV-1 cases. This subtype is generally normal in southern Africa, east Africa, and India.

Subtype B is the primary subtype that can be found in the United States. It’s likewise the most widely recognized subtype in:

  • different pieces of North America
  • South America
  • Europe
  • Australia
  • the Middle East and northern Africa

The other subtypes are more uncommon. For instance, the joined commonness of contaminations because of Subtypes F, H, J, and K was 0.9 percentTrusted


At the point when an infection enters a host cell, it starts to imitate, which means it makes a greater amount of itself. Nonetheless, numerous infections are exceptionally messy at making new duplicates of their hereditary material. This implies that changes can happen.

All infections change, and HIV is no special case. When infections transform, an alternate variation of an infection can be delivered. As a rule, these variations can be alluded to as viral strains.

For instance, inside Subtype B there can be an immense assortment of strains that are somewhat not quite the same as each other. Notwithstanding, they’re all still hereditarily comparative enough to one another to be delegated Subtype B infections.

It’s likewise conceivable that you may see the distinctive subtypes alluded to as strains. For instance, an article may allude to “Subtype B strains.” This references all variations that are incorporated under the hereditary umbrella of Subtype B.

Would you be able to contract more than one strain?

It is possible to contract more than one strain of HIV. This is called superinfection. When superinfection occurs, at that point, the new strain is either pre-suppressed or is simultaneously present in the body.

The specific similarity of HIV superinfection is unclear, and gauges may depend on singular examinations. Some information proposes that the rate of superinfection rate can go up to a source of 0 and 7.7 percent each year.

Superinfection can affect HIV treatment. This is on the basis that the new infection may be impervious to the antiretroviral drugs a person is currently taking.

As indicated by the CDCTrusted source, superinfections that are harder to treat with antiretroviral drugs are uncommon. In addition, proceeding to direct antiretroviral drugs may aid in keeping superinfections.

It is additionally practical for an individual to contract both HIV-1 and HIV-2. This double contamination has a prevalence of up to 3.2 percent in West Africa. In addition, some information suggests that HIV-2 may moderate the HIV-1 movement. And go to buy tenvir-em online to stop hiv.

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