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Yet, this fast-spreading virus does not infect all the members of an infected persons family. On an average, only 10-20% of family members develop the infection after one infection in their family. This rate of secondary cases in a close contact in the family is called household Secondary Attack Rate (SAR).
A global literature review we conducted at the Indian Institute of Public Health Gandhinagar (IIPHG) on SAR showed that the rate is variable from 4.6% to 50%. Infection rates are higher among the spouse or partner of the primary case and elderly members of the family, but it is lower in children. But most studies showed that 80-90% family members do not develop Covid-19 after a primary case is diagnosed in the family.
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? Yet, this fast-spreading virus does not infect all the members of an infected persons family. On an average, only 10-20% of family members develop the infection after one infection in their family. This rate of secondary cases in a close contact in the family is called household Secondary Attack Rate (SAR). A global literature review we conducted at the Indian Institute of Public Health Gandhinagar (IIPHG) on SAR showed that the rate is variable from 4.6% to 50%. Infection rates are higher among the spouse or partner of the primary case and elderly members of the family, but it is lower in children. But most studies showed that 80-90% family members do not develop Covid-19 after a primary case is diagnosed in the family. https://www.hindustantimes.com