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Anders Tegnell corrected SVT’s Nike Nylander on when coronary heart disease is most contagious.
The state epidemiologist’s response puzzles parts of the research world.
But a heavy name in the field gives you the right.
On Sunday’s “Agenda”, viewers were able to see Anders Tegnell correct host Nike Nylander not just once but twice. The substance was an asymptomatic infection, which means that you infect other people without realizing or experiencing symptoms.
You infect at most maybe two days before and two days after … in Nylander.
– No, you are not infected at most two days before. You get infected most of the time when you get sick, Tegnell interrupted.
In any case, you are very contagious a couple of days before, in Nylander.
– No, it is not very contagious a couple of days before, it is very contagious in relation to the disease, said Tegnell.
Maybe a misunderstanding?
Tegnell’s response puzzles Joakim Dillner, professor of infection epidemiology at the Karolinska Institutet. A person is most contagious a day or two before and a day or two after getting sick, he says.
– About half of all infections occur by people who are unaware of the infection and have no symptoms, it is an important part of all spread, says Dillner.
Photo: Photographer Ulf Sirborn
Joakim Dillner, professor of infection epidemiology at Karolinska Institutet.
Tegnell said “you are no very contagious a couple of days before, you are very contagious in relation to getting sick ”, what do you think about it?
– Probably received many questions and it may have been a misunderstanding, I do not dare to comment.
Is there a consensus on this in the research world?
– I thought there was consensus on this. That is why I am surprised to hear this.
“There I agree with Tegnell”
Niklas Arnberg, a virologist at Umeå University, shares Dillner’s assessment.
– It is more contagious in relation to starting to feel symptoms and sometime before, he says.
Photograph: Alexandra Bengtsson / SvD / TT / TT NYHETSBYR≈N
Niklas Arnberg, a virologist at Umeå University.
But Jan Albert, professor of microbiology and infection control at Karolinska Institutet, supports Tegnell’s claim. A person is most contagious when virus levels in the body are at their highest and when they just got sick, he says.
– There I agree with Tegnell. Virus levels are at their highest when you have symptoms, two days early is a little more in advance. Maybe a couple of hours or half a day in advance, he says.
Complex
Jan Albert adds that other factors also determine infectivity, not least human behavior.
– If you have symptoms and you cough and sneeze, you spread the virus around you more, but you may also be more aware that you are contagious and therefore better at protecting your surroundings. This is complex, but people who have never had symptoms or who have not yet had symptoms contribute to the spread of the infection, there is much evidence today.
Photo: Janerik Henrsson / TT / TT NEWS AGENCY
Jan Albert, Professor of Microbiology and Infection Control at Karolinska Institutet.
The World Health Organization, WHO, writes this about when you are most infected: Laboratory data shows that infected people appear to be most contagious just before they develop symptoms (that is, 2 days before they develop symptoms) and early in the illness.
Aftonbladet has unsuccessfully sought out Anders Tegnell for comment.
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