Some important findings from this contact tracing study in Taiwan of 100 index cases; ja.ma/3d4M29S
* 22 secondary cases among 2761 close contacts=secondary attack rate (SAR) 0,8%
* 22 secondary cases among 2761 close contacts=secondary attack rate (SAR) 0,8%
* SAR highest among household contacts (4.6%) and non-household family members (5.4%)
* Very few secondary cases in other settings. What is different in Taiwanese people? No hand shaking? Face masks? Keeping more distance? /2
* Very few secondary cases in other settings. What is different in Taiwanese people? No hand shaking? Face masks? Keeping more distance? /2
* Of 9 asymptomatic cases, none transmitted to any of 91 close contacts.
* SAR increased with disease severity
* None transmission occurred beyond day 6 of symptom onset.
* Transmission occurred as early as 5 days prior to symptom onset. /3
* SAR increased with disease severity
* None transmission occurred beyond day 6 of symptom onset.
* Transmission occurred as early as 5 days prior to symptom onset. /3
What do we learn from this?
Quarantining households is essential and should start at the slightest suspicion of infection
Completely asymptomatic infections are probably not a big concern, so testing should focus on those who develop symptoms. /4
Quarantining households is essential and should start at the slightest suspicion of infection
Completely asymptomatic infections are probably not a big concern, so testing should focus on those who develop symptoms. /4
Beyond the first week of illness, it seems safe to lift isolation and PPE
Contacts tracing should include those who only had contact in de days before symptom onset in the case /5
Contacts tracing should include those who only had contact in de days before symptom onset in the case /5
We may want to take a closer look at how Taiwanese people interact and behave in public. Perhaps there lies the key to mitigation./end
