{Reference Type}: Comparative Study
{Title}: A comparison of COVID-19 secondary attack rate in household and close contacts compared to current risk stratification guidelines of the Kerala government.
{Author}: Rathish B;Wilson A;Joy S;
{Journal}: Trop Doct
{Volume}: 51
{Issue}: 3
{Year}: Jul 2021
{Factor}: 0.828
{DOI}: 10.1177/00494755211002012
{Abstract}: COVID-19 has been found to be highly infectious with a high secondary attack rate with a R0 of 3.3. However, the secondary attack rate based on risk stratification is sparsely reported, if ever. We studied the contact tracing data for two index cases of COVID-19 with some overlap of contacts. We found that 60% of high-risk contacts and 0% of low-risk contacts of symptomatic COVID-19 patients contracted the infection, in keeping with the Kerala government contact risk stratification guidelines.