University of Florida Researchers Find No Asymptomatic Spread

"The asymptomatic/presymptomatic secondary attack rate is not statistically different from zero,"

Related: Asymptomatic Spread Is So Rare It Only Happens 0.7% of the Time Even in Households


Four researchers from the University of Florida Department of Biostatistics co-authored a study published online by the Journal of the American Medical Association. They performed a meta-analysis of 54 studies looking at the household secondary attack rate of SARS-CoV-2. According to the CDC, the secondary attack rate is the number of new cases among contacts divided by the total number of contacts.

The researchers confirmed that SARS-CoV-2 is more contagious than other coronaviruses, with a secondary attack rate of 16.6% (95% CI 14.0%-19.3%) compared to 7.5% (95%CI 4.8%-10.7%) for SARS-CoV and 4.7% (95%CI, 0.9%-10.7%) for MERS-CoV.

Their findings also confirmed the attack rate is higher to adult contacts compared to child contacts and to spouses compared to other family members.

The secondary attack rate for symptomatic index cases was 18.0% (95% CI 14.2%-22.1%), and the rate of asymptomatic and presymptomatic index cases was 0.7% (95% CI 0%-4.9%), “although there were few studies in the latter group.” The asymptomatic/presymptomatic secondary attack rate is not statistically different from zero, and the confidence interval is technically 0.7 ± 4.2, resulting in a range of -3.5%-4.9%, but attack rates cannot be negative, so it is truncated at 0.

Source: Alachua Chronicle



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cechas vodobenikov
cechas vodobenikov
30 days ago

meta analyses suffer from the assumption that the studies analyzed are methodologically rigorous. we have enough evidence to show the martial law has been a mistake

Jesus
Jesus
29 days ago

Martial law? Do you know what martial law is? Who in the world used the military to overcome a non working civil government because of COVID?

cechas vodobenikov
cechas vodobenikov
27 days ago
Reply to  Jesus

u mask slaves submissively closed businesses, fined any restaurant that rejected your authoritarian fascism. apparently they do not educate in your trailer park…USA uses police for this, arresting people in parties in LA, cutting utility service. Peru, NZ, Australia, Ireland, Spain Croatia worse

Jesus
Jesus
27 days ago

FYI I do not live in a trailer park, I am far more familiar with the issues in the US than you are……if wearing a mask in public is such an aggravated offense for you, then you are a very fragile man. Using the mask for ideology purposes to inflate conspiracy theories makes you delusional useful idiot for those that brainwashed you.

Jesus
Jesus
27 days ago

The US federal government did not impose any restrictions, it was the states that tailored specific guidelines for their population.
Trump wanted to keep things open and achieve herd immunity…..as Darwinian theory of the fittest to survive.
If Trump would have kept things open since he lacks any concern and emphatic for human beings, Bezo and his empire would have not have flourished…….that is the extent of your shallow argument about Bezo and the deep state.
So the choice was …..money or people’s lives. Trump was interested in money and wanted to keep the economy going, states were concerned about people and took precautionary measures. Trump blamed the states, the stats blamed Trump when the pandemic spiked.

In China and rest of Asia the emphasis was on the people and secondarily on the condition of the economy.

voza0db
29 days ago

BORING! There is no new “viral particle” there is no new “special” type of pneumonia…

THESE ARE FACTS SINCE DECEMBER 2019

Curb
Curb 'Em All
29 days ago

..but then how did Obama make everyone dress up like Muslims for his 3rd term?

ke4ram
ke4ram
29 days ago

Wonder what bug they studied as covid has never been isolated and no one has laid eyes on it. Must be one of those “government” grant thingies You know,,, money given to find what the government wants them to find. Don’t find it… no more money. Has to be the case since they were actually allowed to publish it. Anything to the contrary would never see the light of day.

This is how they’re keeping this BS going. Everybody gets a pay off. Look at the latest great giveaway… They’re calling it foreign aid but what it really is,,, is payoffs to governments that are going along with the new green fascism. I mean,,, have you heard that little dropout Greta lately?

disqus_3BrONUAJno
disqus_3BrONUAJno
29 days ago

This is what was bound to happen once the high Ct numbers were forced into the open.

Jesus
Jesus
29 days ago

De Santis governor of Florida is well known to suppress or obfuscate scientific information for political expediency and justify to keep Florida open for business. A Trump clone.

cechas vodobenikov
cechas vodobenikov
27 days ago
Reply to  Jesus

obviously u believe any CIA ruling class lie

cechas vodobenikov
cechas vodobenikov
27 days ago

covid fascim has doubled the wealth of US oligarchs—this is why they all funded the fascist harris and her pet poodle biden

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