Seoul, Sep 23 - People with 'silent' or asymptomatic Covid-19 infection have as much coronavirus in their noses and throats as those with symptom

Seoul, Sep 23 - People with 'silent' or asymptomatic Covid-19 infection have as much coronavirus in their noses and throats as those with symptom

Seoul, Sep 23 - People with 'silent' or asymptomatic Covid-19 infection have as much coronavirus in their noses and throats as those with symptom

Seoul, Sep 23 - People with 'silent' or asymptomatic Covid-19 infection have as much coronavirus in their noses and throats as those with symptom

Seoul, Sep 23 - People with 'silent' or asymptomatic Covid-19 infection have as much coronavirus in their noses and throats as those with symptom

Seoul, Sep 23 - People with 'silent' or asymptomatic Covid-19 infection have as much coronavirus in their noses and throats as those with symptom

Seoul, Sep 23 - People with 'silent' or asymptomatic Covid-19 infection have as much coronavirus in their noses and throats as those with symptom

Seoul, Sep 23 - People with 'silent' or asymptomatic Covid-19 infection have as much coronavirus in their noses and throats as those with symptom

Seoul, Sep 23 - People with 'silent' or asymptomatic Covid-19 infection have as much coronavirus in their noses and throats as those with symptom

Seoul, Sep 23 - People with 'silent' or asymptomatic Covid-19 infection have as much coronavirus in their noses and throats as those with symptom

Seoul, Sep 23 - People with 'silent' or asymptomatic Covid-19 infection have as much coronavirus in their noses and throats as those with symptom

Seoul, Sep 23 - People with 'silent' or asymptomatic Covid-19 infection have as much coronavirus in their noses and throats as those with symptom

Seoul, Sep 23 - People with 'silent' or asymptomatic Covid-19 infection have as much coronavirus in their noses and throats as those with symptom

Seoul, Sep 23 - People with 'silent' or asymptomatic Covid-19 infection have as much coronavirus in their noses and throats as those with symptom

Seoul, Sep 23 - People with 'silent' or asymptomatic Covid-19 infection have as much coronavirus in their noses and throats as those with symptom

Seoul, Sep 23 - People with 'silent' or asymptomatic Covid-19 infection have as much coronavirus in their noses and throats as those with symptom

Seoul, Sep 23 - People with 'silent' or asymptomatic Covid-19 infection have as much coronavirus in their noses and throats as those with symptom

Seoul, Sep 23 - People with 'silent' or asymptomatic Covid-19 infection have as much coronavirus in their noses and throats as those with symptom

Seoul, Sep 23 - People with 'silent' or asymptomatic Covid-19 infection have as much coronavirus in their noses and throats as those with symptom

Seoul, Sep 23 - People with 'silent' or asymptomatic Covid-19 infection have as much coronavirus in their noses and throats as those with symptom

Seoul, Sep 23 - People with 'silent' or asymptomatic Covid-19 infection have as much coronavirus in their noses and throats as those with symptom

Seoul, Sep 23 - People with 'silent' or asymptomatic Covid-19 infection have as much coronavirus in their noses and throats as those with symptom

Seoul, Sep 23 - People with 'silent' or asymptomatic Covid-19 infection have as much coronavirus in their noses and throats as those with symptom

Seoul, Sep 23 - People with 'silent' or asymptomatic Covid-19 infection have as much coronavirus in their noses and throats as those with symptom

Seoul, Sep 23 - People with 'silent' or asymptomatic Covid-19 infection have as much coronavirus in their noses and throats as those with symptom