According tomedia reports, the new coronavirus in the indoor easy to spread. That’s why public health experts have been recommending the same measures to reduce the risk of transmission, including wearing masks, keeping social distances and washing hands frequently. Recently, some officials have begun recommending ventilation of homes and other indoor spaces to reduce the risk of aerosol transmission. A few months ago it was reported that the most dangerous place for the spread of the new coronavirus was at home.
Of course, this makes sense, because people tend to feel safe and relaxed there. People are less likely to wear masks at home and are less likely to keep social distance all the time. If one person in one family is infected, others may also be infected with COVID-19. One of the reasons people tend to be infected is that a person is contagious before they have symptoms.
A new study published by the Centers for Disease Control and Prevention (CDC) shows that COVID-19 is spreading rapidly in households, with secondary cases occurring even faster than expected.
Researchers from Vanderbilt University Medical Center recruited families from April to September in Nashville, Tennessee, and Mashfield, Wisconsin. There is 1 indexed patient per household, which is a confirmed case of COVID-19 detected by PCR. The researchers then remotely trained each family member to complete a symptom diary and take self-collected samples daily for 14 days. A total of 101 index patients and 191 family contacts were included in the study.
The 191 contacts showed no symptoms on the day their index patients were diagnosed with the disease. But in follow-up, 102 out of 191 people eventually tested positive for SARS-CoV-2. Dr Keipp Talbot, who led the Vanderbilt study, told the media: “We found that COVID spreads very quickly at home. “
He continued: “Once the virus enters your home, it’s hard to stop it from spreading, you don’t know who’s going to get the virus in your home, and they need hospital treatment.” “
The CDC study may provide the best index yet of the severity of home transmission. Data show that 53% of contacts are infected with COVID-19. This is much higher than the 20 to 40 percent infection rate for households identified in the study.
In 14 households, index patients were under the age of 18. Secondary infections in children under 12 years of age accounted for 53 per cent and secondary infections in children aged 12-17 accounted for 38 per cent. The results suggest that children and adolescents can infect other family members like adults.
The study also noted that 75 percent of secondary infections were diagnosed within five days of the first patient developing symptoms, and that substantial transmission occurred regardless of whether the first patient was an adult or a child.
In response, the researchers believe that all family members should wear masks when sharing a common space at home, except for isolation.
The researchers also note that communities should use “frequent and systematic testing” to reduce and prevent the spread of COVID-19 by detecting cases before symptoms appear.