How long is delta variant contagious: Covid-19:

4 min readSep 3, 2021
How long is delta variant contagious:
How long is delta variant contagious: Covid-19:

How long is delta variant contagious:

No matter the variant, you may be contagious for as long as two weeks to a maximum for (in rare cases) 18 days with the Coronavirus or from any of its many variants, including the Delta variant. Having said that, it does not make delta variants the same as their predecessors.

Corona virus and its delta variant, though both being contagious for most of the same time, are very different in terms of how they spread and that is where the danger lies.

Health officials estimate that:

  • A Delta variant infected person could infect five to nine people with the virus, compared with two or three with the usual variants of COVID-19.
  • According to the Massachusetts Institute of Technology, Delta variants also make people sicker faster. Those who tested positive for the delta variant took three to five days to do so. On the other hand, in 2020, positive tests were noticed 6 days after the exposure.

So the contagiousness of all coronavirus and it’s variants (including Delta variant) as of now is the about the same but its severity what makes Delta variant more severe and feared than other variants.

Is the delta variant more contagious:

Certainly, Director of the CDC Rochelle Walensky told a COVID-19 briefing this week that delta variant infections are higher than previous strains, particularly the original alpha variant.

  • If you have the alpha variant, you can infect approximately two others who aren’t vaccinated with you if you become ill. The delta variant can spread almost twice as many diseases as the original strain if you get sick with it, approximately five other people.

Delta variants can infect more people since they have higher viral loads, which allows them to spread the virus a lot faster.

How much more infectious is the Delta variant? How is it able to do that:

CDC documents in early august indicate that the Delta variant is one of four “variants of concern” that have emerged from COVID-19, the virus that causes SARS-CoV-2. It is over twice as infectious as the original virus and is considered as infectious as chickenpox.

One reason it is so infectious could that it replicates more in the body. Researchers from China recently reported that Delta variant infected individuals carry 1,000 times more viral load compared to the original. In that study, researchers also found that people infected with the Delta variant carried detectable virus sooner than those immune to the original virus (four days instead of six). A second study also found that they remained infectious for longer (18 days instead of 10).

Besides replicating more, it’s replicating faster, which probably explains why it’s spreading so much more quickly.

Are any variants more deadly:

At the moment, the delta variant is the most deadly of all Covid variants, but to say that this is the last of the variants is wrong as variants have continued to emerge and spread since delta emerged. Eta, Iota, Kappa, and Lambda have been designated as “variants of interest” by the WHO, and 13 other variants are being tracked that have originated in the United States, Brazil, the Philippines, Indonesia, Colombia, and other nations.

Delta variant: A more contagious variant:

Viruses undergo mutations as they live and SARS-CoV-2 has experienced many mutations — especially because of having infected some 200 million cases around the word and counting. There was no doubt that a more contagious strain would emerge as Alpha variants had this quality earlier than Delta variants.

Deaths and hospital admissions both increased with the Delta variant because there is much more evidence of the Delta variant’s infectious potential. Those with the Alpha variant of the coronavirus — the first detected strain — could infect two others as compared to taking the Delta into account, the estimate comes to about five or more. In addition, those who carry the Delta virus have a higher viral load, meaning they carry a greater amount of the disease.

As a result, the CDC said in a memo that the Delta variant was equally contagious as chickenpox, a virus that had been far more widespread before a vaccine was approved in the United States in 1995. In other words, Delta is more likely to spread in a shorter amount of time, especially among people who are not vaccinated.

Although we desperately wish to end this pandemic, We have not seen the last of COVID-19, especially in light to all the new variants emerging, so our fight must continue for a little while longer.

This is why the Centers for Disease Control and Prevention recommends wearing a mask indoors for everyone, including children who are too young to receive vaccinations and are returning to school.


We will recover from the current outbreak faster, fewer deaths will occur and the medical system will not be strained only if we can increase vaccinations as the evidence suggest as of now. Delta variants are more likely to cause breakthrough infections but these infections are usually mild or asymptomatic. Luckily, the vaccines are still protecting against COVID, which is good news.

Also read: Can you still get sick after vaccine: