HomeWorld NewsWhy some people in close quarters get COVID-19 — and others don’t

Why some people in close quarters get COVID-19 — and others don’t

Although the extremely transmissible Omicron variant of COVID-19 is ripping by means of the United States at document charges, some households have been affected inconsistently, with some people testing constructive for COVID-19 whereas others in the identical family don’t.

Coronavirus vaccines and boosters are very efficient at stopping extreme sickness, hospitalization and loss of life from COVID-19, however breakthrough infections can happen, normally with milder signs. According to the Centers for Disease Control and Prevention, “Anyone with Omicron infection can spread the virus to others, even if they are vaccinated or don’t have symptoms.” So at this level, if a family has a COVID-positive particular person, ought to the remainder of the family ought to count on to get it no matter vaccination standing?

Not essentially, says Dr. Lucy McBride –– a doctor in Washington, D.C., who can also be a Yahoo News Medical contributor. She explains that people and the virus relate to at least one one other in other ways relying on numerous elements.

(Some responses have been edited for readability.)

Yahoo News: Why do some people who’re in the identical family get COVID-19, and others don’t? Can it’s in comparison with the flu?

Dr. Lucy McBride: It may be helpful at this second of the pandemic to start out to consider evaluating the flu and coronavirus. Not that they’re equal in any respect, however you might need a case of flu in the household, in the family, and some people may get contaminated and others won’t. Similarly, you could have a COVID case in your loved ones and some people in the household may get COVID and some won’t. And whether or not or not a single particular person will get contaminated and/or sick after an publicity in the family hinges immediately on the quantity of virus that’s put out by the COVID-positive particular person, and the circumstances in that area, and the immune system, and vaccination standing of the one who is being uncovered.

You can have inhaled a small viral load from the contaminated particular person, you’ll be able to have inhaled a big viral load. In different phrases, you could have inhaled a special quantity of virus. You even have a novel response to the virus primarily based in your underlying well being circumstances, your immune system and the opposite elements at play. For instance, if in the house you’re uncovered in a big room the place the home windows had been open, that is going to be maybe a special stage of publicity than somebody who’s sleeping in the identical room because the COVID-positive particular person. You might, for instance, have had three photographs and you are a younger, wholesome particular person, and you might not get as sick in consequence. We know that vaccinated people get sometimes much less sick than people who’re unvaccinated or have underlying well being circumstances.

So keep in mind that it isn’t computerized that somebody will get contaminated in the family. Yet, family transmission is the commonest downside. And the rationale we see widespread transmission of a very contagious variant, as a result of throughout the identical home, people usually aren’t masked and they’re in close quarters.

When is an individual most contagious with the Omicron variant?

We’re seeing with Omicron — this extremely transmissible, although much less intrinsically extreme, variant of coronavirus — that people are ready transmit the virus to different people from as quickly as a day after they’re contaminated to as much as 10 days after they’re contaminated. But the extra widespread window is between 24 hours previous to growing signs and 5 days after growing signs. But, after all, these ranges are variable relying on the particular person.

What is the testing timeline for those who’ve had a COVID-19 publicity?

I’m recommending to my sufferers [that] they observe the CDC pointers and isolate for 5 days and masks for Day 6 to 10 and train warning throughout that point. I’m additionally recommending to my sufferers that if they will afford it and they will entry it, to take a speedy antigen check at Day 5 in order to go away isolation, if that speedy antigen check is detrimental on Day 5, you are fairly certain you are not contagious to different people. If it is constructive, you’d check once more on Day 6. And for those who’re detrimental on Day 6, then you’ll be able to go away isolation. A detrimental antigen check tells you with fairly good confidence that you just’re now not carrying contagious ranges of virus in your nostril.

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