Ok a few things have been moving in the world of paediatric #COVIDー19 literature

Time for an updated #tweetorial on SARS-CoV-2 infection in children!

#FOAMped #FOAMed #PedsICU #PedsID #IDtwitter

1/12
So there are fewer cases in children. How much fewer?

Children consistently make up <2% of confirmed COVID-19 cases. These are usually ascertained by testing sick people in hospital

US: http://dx.doi.org/10.15585/mmwr.mm6914e4
Italy:">https://dx.doi.org/10.15585/... https://jamanetwork.com/journals/jama/fullarticle/2763401
Madrid:">https://jamanetwork.com/journals/... https://jamanetwork.com/journals/jamapediatrics/fullarticle/2764394

2/12">https://jamanetwork.com/journals/...
COVID-19 is less severe in children, but often is it severe?

From a Chinese cohort 0.6% needed PICU but lots of community testing involved
https://pediatrics.aappublications.org/content/early/2020/03/16/peds.2020-0702

US">https://pediatrics.aappublications.org/content/e... CDC data has 2% of admissions in PICU (limited data)
http://dx.doi.org/10.15585/mmwr.mm6914e4

3/12">https://dx.doi.org/10.15585/...
So why aren& #39;t we seeing kids with COVID-19? Is it because they& #39;re not getting it, or just not sick enough to go to hospital?

Iceland tested 6% of their whole population. In community testing (random), 0/848 of children <10yrs were positive

https://www.nejm.org/doi/full/10.1056/NEJMoa2006100

4/12">https://www.nejm.org/doi/full/...
OK but when they DO get symptoms, what does it look like?

Cough and fever much less frequent than in adults (both ~50% of cases) with about 10% having GI symptoms

No reports of anosmia or rashes as yet...

7/12
How about vertical/intrauterine transmission? This is complicated

ALL swabs of placenta/amniotic fluid/vaginal fluid negative so far

But some babies have been IgM +ve positive at birth. IgM doesn& #39;t cross the placenta so implies infection

https://jamanetwork.com/journals/jama/fullarticle/2763854

9/12">https://jamanetwork.com/journals/...
Now we know SARS-CoV-2 serology is not great so far, and IgM has high cross-reactivity, so remains to be seen whether this will be born out in future research.

So what about kids with comorbidities/immunosuppression?

10/12
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