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▪️Bachelorette party in Rhode Island last month traced to #covid19 outbreak in Massachusetts — 19 of ~20 attendees infected

▪️Reported that they rented a house together—> even w low community transmission, risk can be high in close-contact shared spaces

wbur.org/commonhealth/2…
2/ This is not meant to be about shaming how/why people choose to socialize (can already see the bachelorette party hating tweets coming)— community transmission in NE is low; still need to share outbreaks that are happening so we can avoid them & keep outbreak controlled.
Cc @jeffjarvis @ericmbudd @InfectiousDz @V2019N
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Dr. Abraar Karan
@AbraarKaran
1/ While understanding/controlling transmission of #covid19 can feel very complicated w/ the multitude of different tests; the arguments over droplets/aerosols; the confusion over asymptomatic v presymptomatic etc— the *basics* are actually the most important part of all this.
2/
•Avoid prolonged close contact.

•Avoid closed indoor spaces w/ multiple other people.

•Avoid crowded places.

•Wear your mask especially in any of the above scenarios.

•If you can choose outdoors, always choose outdoors.

Do the basics well and do them *consistently*
Cc @carlzimmer @jeffjarvis @balajis @V2019N @CarolineYLChen @CaroMT @mccabe_caitlin @Dometi_ @apoorva_nyc @jljcolorado @SaskiaPopescu @nataliexdean @RanuDhillon @kakape @B_resnick
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Dr. Abraar Karan
@AbraarKaran
1/ #covid19 outbreak investigation of the Yokohama Cruise Ship

Over 3 week period, 20% of passengers infected; 14% of staff

Attack rate was highest in cabins of size 4 or more-- 30%

Not convinced by their thoughts on mode of transmission..
wwwnc.cdc.gov/eid/article/26…
2/ They mention that there didn't seem to be spatial clustering of infected cabins on the same floor/zone, & that this implies it was not primarily spread via droplets/ more evidence it was potentially spread by aerosolized particles?

This doesn't make sense to me.
3/ Most people prob aren't interacting closely w/ other random cabins on their floor but do share same hallways at diff times.

If anything, clustering by floor/zone in which people don't interact face to face as much would suggest lingering aerosols- which we didn't see here.
Read 7 tweets
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Dr. Abraar Karan
@AbraarKaran
A wedding in rural Maine led to the state's largest #covid19 outbreak. The screening for the party was symptom and temperature checks. The presumed index case showed symptoms the day after the ceremony. Remember- spread is also *presymptomatic*
bostonglobe.com/2020/08/29/nat…
2/ In all, half of the attendees became ill. An elderly couple were infected by a wedding guest-- the wife unfortunately passed away.

A jail 220 miles away had an outbreak from one of the wedding attendees.

This article tells the story of one outbreak...
3/ But it really tells the story of how outbreaks happen.

They happen when you least expect it-- when you think you've taken enough precaution; they spread quickly, and affect people far and near.

The best we can do is follow the basics consistently.
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