(1/5) Study of #SARSCoV2 antibody prevalence in children from Bavaria, Germany, showing infections in children were 6 times higher than PCR tests suggested, and that young & older children were equally likely to be infected. Almost half were asymptomatic. sciencedirect.com/science/articl…
(2/5) The children in this study were recruited from a representative, population-based diabetes screening study of 11,884 children.
Overall, 0.87% tested positive between April and July.
Almost half (47%) had had an asymptomatic infection.
(3/5) There was no statistically significant difference in antibody prevalence between children aged 0-6 years (0.84%) and those aged 7-18 years (0.98%).
In contrast, the results of official PCR tests had suggested young children were much less likely to be infected.
(4/5) This study therefore has two key findings.
First, cases in children are frequently undetected. This is also true for adults.
The second, more important finding is that cases in young children are disproportionately missed.
(5/5) The study therefore suggests that both young and older children are equally likely to be infected, and that the high prevalence of asymptomatic infection in children is causing cases in younger children to go undetected.
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(1/7) Important prospective study of household transmission by CDC, suggesting children and adults are similarly likely to transmit #SARSCoV2. The household secondary attack rate was at least 35%, and 18% of cases were asymptomatic. cdc.gov/mmwr/volumes/6…
(2/7) In this study, 101 households (each with one index patient) from Tennessee and Wisconsin were followed for at least 7 days. A total of 191 household contacts of these index patients completed symptom diaries, and self-collected nasal or saliva specimens which were tested.
(3/7) None of the 191 household contacts had symptoms on the first day of the study, although some tested positive indicating they had recently been infected.
Including these contacts, the secondary attack rate was 53%. Excluding these contacts, it was 35%.
The figure quoted for mortality in the paper is the case fatality rate, which is applicable to hospitalised children (a thankfully uncommon occurrence).
The infection fatality rate (mortality among all children who become infected) is probably 1000 times lower.
However, infections in children remain extremely important, because children can transmit the virus to older adults and other at-risk persons, who have far greater risk for mortality.
We will also not be able to control the pandemic unless we address transmission by children.
(1/7) Report by Ministry of Health, Israel, showing children more likely to be infected than adults, are mostly asymptomatic, can be superspreaders, that school clusters spread into the community, and that school reopening accelerated the epidemic there. gov.il/BlobFolder/rep…
(2/7) As shown in the figure below, children were more likely to test positive than adults (8% vs. 6% of all PCR tests conducted in Israel).
Children were also more likely to test positive for #SARSCoV2 antibodies than adults (7% vs. 2 - 5%).
(3/7) Most children with #COVID19 were asymptomatic (51-70%).
As shown in the figure below, children of pre-school & primary school age were more likely to be asymptomatic than older children.
The top (pink) bar indicates the proportion who were asymptomatic in each age group.
(1/5) Study showing that school closures were associated with a marked reduction in the common cold in adults in the UK.
When schools reopened, rhinovirus detections surged. Physical distancing measures in schools are inadequate to prevent transmission. thelancet.com/journals/lanre…
(2/5) In this study, patients admitted to hospital between March and September 2020 in Southampton were screened for rhinovirus.
The results were compared against data for 2019.
There was a marked decrease in rhinovirus in 2020, which was associated with school closures.
(3/5) When schools reopened, rhinovirus infections in adults increased, and became comparable to the previous year.
This suggests children are a major driver of the common cold, and that #COVID19 precautions in schools are inadequate to prevent transmission of rhinovirus.
(1/6) A new pre-print study (interpret carefully) describes *in vitro* evidence of antibody dependent enhancement (ADE) after natural infection with #SARSCoV2 in some people. ADE is when antibodies make a second infection worse. scmp.com/news/china/sci…
(2/6) If ADE occurs, it is most likely to happen late after recovery when levels of neutralising antibodies have waned.
This article is damning. I strongly recommend reading it to the end.
“The Swedish way has yielded little but death and misery. And, this situation has not been honestly portrayed to the Swedish people or to the rest of the world.” time.com/5899432/sweden…
Sweden:
“Only 13% of the elderly residents who died with COVID-19 during the spring received hospital care”
Sweden:
“Policymakers essentially decided to use children and schools as participants in an experiment to see if herd immunity to a deadly disease could be reached”