Christian AlthausKonto zweryfikowane

Brazil has higher #SARSCoV2 incidence in more densely populated states. Little information on travel histories - early from Italy & Spain. Basic R0 2.6-2.9 - but cases in urban areas spread to less populated locations. #COVIDdynamics

Again, 'disparities' make an appearance: higher income & #COVID19 diagnosis - first introduced into high-income areas & spread to lower. Difficult to asses spread in lower-income areas; challenging to get accurate diagnoses. Unequal access skews picture. #COVIDdynamics

Brazil is 2nd highest in confirmed cases in world at 2.55 million cases After interventions, R drops from 3 to 1-1.6 Incredibly, first case went from sampling to sequence & report in only 48 hours!! An incredible achievement! #COVIDdynamics

@nmrfaria has detected over 100 introductions, & 3 main clades in Brazil - where majority of sequences cluster. It's possible to see the transition from within & between state transmission - international imports move to local transmission. Most are within state! #COVIDdynamics

Finally we come to our final talk in an absolutely fantastic day - @Tuliodna will take us back across the ocean to Africa, to hear about #SARSCoV2 spread in Africa - a fitting way to finish the session! #COVIDdynamics

@Tuliodna, sporting a fantastic new moustache , outlines some of his main questions: Can we estimate # introductions into Africa, and when, how, & where did community transmission happen? Which lineages? And can we use genome data to control & prevent outbreaks? #COVIDdynamics

South Africa leads the pack for sequencing in Africa, but throughput is improving! At the moment, can measure >300 introductions into Africa, but potentially 1000s - limited by seq data. Mostly from Europe (80%), but early intro from Asia & later from Americas. #COVIDdynamics

Highlighting a few South Africa clusters - an introduction from Netherlands spread rapidly in a supermarket in Cape Town. Can spot a few distinct cluster expansions like this! These serve as amplification events that can fuel larger spread. #COVIDdynamics