Asymptomatic people also responsible for virus spread

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RESTRICTIONS: Broadcast: NO USE JAPAN, NO USE TAIWAN Digital: NO USE JAPAN, NO USE TAIWAN
New research by health specialists from Singapore shows evidence that asymptomatic individuals infected with SARS-CoV-2 can inadvertently spread the virus.

According to a new study from Singapore published in the Centers for Disease Control and Prevention Morbidity and Mortality Weekly Report, medical researchers studied 243 cases of coronavirus infections that occurred in Singapore from January 23 to March 16.

Out of these 243 cases, researchers detected seven clusters of cases that showed possible presymptomatic transmission of the virus. The researchers determined that 10 cases from these seven clusters were due to presymptomatic transmission.

For example, a man in Cluster E had traveled to Japan from February 29 to March 8 where he may have been infected. The man later infected his housemate before showing any symptoms. Both developed symptoms on March 11.

A woman in Cluster B, named Patient B1 in the paper, attended an event on February 15 where she likely came into contact with a confirmed COVID-19 patient. Nine days later she attended singing classes with another woman, Patient B2. Two days later Patient B1 developed symptoms. Patient B2 developed symptoms on February 29.

RUNDOWN SHOWS:
1. Researchers carrying out a study
2. Number of presymptomatic transmission cases
3. Asymptomatic man transmits virus to roommate
4. Asymptomatic woman transmits virus to classmate

VOICEOVER (in English):
"According to a new study from Singapore published in the Centers for Disease Control and Prevention Morbidity and Mortality Weekly Report, medical researchers studied 243 cases of coronavirus infections that occurred in Singapore from January 23 to March 16."

"Out of these 243 cases, researchers detected seven clusters of cases that showed possible presymptomatic transmission of the virus. The researchers determined that 10 cases from these seven clusters were due to presymptomatic transmission."

"For example, a man in Cluster E had traveled to Japan from February 29 to March 8 where he may have been infected. The man later infected his housemate before showing any symptoms. Both developed symptoms on March 11."

"A woman in Cluster B, named Patient B1 in the paper, attended an event on February 15 where she likely came into contact with a confirmed COVID-19 patient. Nine days later she attended singing classes with another woman, Patient B2. Two days later Patient B1 developed symptoms. Patient B2 developed symptoms on February 29."

SOURCES:
U.S. Centers for Disease Control and Prevention
https://www.cdc.gov/mmwr/volumes/69/wr/pdfs/mm6914e1-H.pdf
https://www.cdc.gov/coronavirus/2019-ncov/prevent-getting-sick/cloth-face-cover.html