OVERVIEW: SSI monitors virus variants and mutations

OVERVIEW: SSI monitors virus variants and mutations

But which variants does SSI keep an eye on – and why? You can learn more about this here.

* Virus variant B117:

The variant was first detected in September last year in England.

There is widespread agreement that the variant is more contagious than the original variant of coronavirus. The increased infectivity is estimated to be between 35 and 75 percent. In Denmark, the relative contact number for the variant shows that it is 55 percent more contagious than the original variant.

A study conducted by SSI shows that people infected with B117 have an estimated increased risk of hospitalization of 64 percent. It is in relation to persons infected with the original variant.

However, SSI emphasizes that in the vast majority of cases, B117 produces mild processes.

In the UK, B117 has been found with an additional mutation, E484K. This is worrying, writes SSI, because studies have shown that E484K provides reduced sensitivity to antibodies.

B117 has since week 7 this year been the dominant corona variant in Denmark.

* Virus variant B1351:

This virus variant was first detected in South Africa last October. A total of 49 cases have been found in Denmark.

It has several mutations in the spike protein on the surface of the virus. Especially three of them – K417N, E484K and N501Y – worry the researchers. It is possible that some of them may affect the infectivity or susceptibility of the variant to antibodies.

Studies have shown that the E484K mutation results in decreased sensitivity to antibodies. Decreased susceptibility to antibodies raises concerns about the effect of vaccines on this variant and the risk of re-infection.

* Virus variant P1:

In January this year, Brazil and Japan reported on the variant P1, which was first found in the Brazilian city of Manaus and among travelers from Japan who had been to Brazil.

The variant has ten mutations in the spike protein. Especially three of them are important to keep an eye on. As the variant has the mutation N501Y, which also has the British and the South African variant, there is a strong suspicion that the variant P1 has increased infectivity. However, this has not been conclusively proven.

It is not known whether the variant causes more serious disease.

P1 also has the mutation E484K, which studies have linked to decreased sensitivity to antibodies.

In Denmark, ten cases of P1 have so far been found. The first was found on Zealand on March 3.

* Virus variant P2:

This variant was found in Rio de Janeiro, Brazil in late December last year.

Like variant P1, this variant also has the mutation E484K, which studies associate with decreased sensitivity to antibodies. It is not known whether the variant causes more serious disease.

The first case in Denmark was found at the end of December 2020. It is not known how many cases have been found in Denmark.

* Virus variant B1525:

The variant was first detected in December 2020 in the UK and Nigeria.

So far, there is no evidence that the variant is more contagious or gives a more serious course of the disease than the original variant.

But it has, among other things, the mutation E484K, which is also found in the South African variant. It is considered to cause decreased sensitivity to antibodies.

At least 61 cases of the corona variant have been found in Denmark, the first of which was in January 2021.

The B1525 variant has also been found in other countries, including Norway, the United States and Canada.

* Virus variant N439K:

The variant was first detected in Scotland in March last year, but it has also been seen in a number of other countries. In Europe, it is especially in Slovenia, the Czech Republic and Romania.

There is an increased focus on this variant, as studies show that N439K, among other things, indicates reduced sensitivity to antibodies.

There is no evidence that this variant affects the effect of vaccines. Nor is there any indication of increased infectivity or a more serious course of the disease.

There is nothing in this variant to suggest that it is more serious than the general picture with coronavirus in Denmark.

There are no known cases in Denmark.

Source: Statens Serum Institut (SSI).

Source: The Nordic Page

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