Infection Risks: Should You Worry About COVID-19 Exposure?

Infection risk

Hello, doctor.
Today I accompanied my mother to a temple to pray, and while waiting for her to ask something, I suddenly heard at the counter that a woman was being asked to leave and advised to see a doctor because the infrared thermal scanner indicated she had a fever, even though she claimed she didn't.
Upon hearing this, I quickly told my mother to stop asking and to leave immediately.
We were both wearing masks, but it seemed that the woman was not wearing one.
Although we did not speak to her directly and were about 5 to 10 meters away, I would like to ask if we could be infected with COVID-19.
I saw in the news that there were confirmed cases of people who contracted the virus even when not in close proximity on public transportation.
The more I think about it, the more worried I become.
Should I start self-monitoring my health?

Yu, 20~29 year old female. Ask Date: 2020/03/13

Dr. Ye Qianyu reply Family Medicine

Hello! Currently, the most accepted mode of transmission is through respiratory droplets, typically within a distance of about one meter, and with close contact lasting more than fifteen minutes.
Based on your description, the distance and contact time are insufficient to cause transmission.
It is recommended that you self-monitor your health for two weeks.

Reply Date: 2020/03/13

More Info

It's understandable to feel anxious about potential exposure to COVID-19, especially in situations where you encounter individuals who may exhibit symptoms of illness. Let's break down your concerns regarding the risk of transmission in the scenario you described.

1. Transmission Dynamics: COVID-19, caused by the SARS-CoV-2 virus, primarily spreads through respiratory droplets when an infected person coughs, sneezes, talks, or breathes. The virus can also be transmitted via contact with contaminated surfaces, although this is considered a less common route. The distance you mentioned (5 to 10 meters) is generally considered safe, especially if you were wearing masks. Masks significantly reduce the risk of transmission by filtering respiratory droplets.

2. Risk Assessment: In your case, since you maintained a distance of 5 to 10 meters from the woman who was potentially symptomatic, and both you and your mother were wearing masks, the risk of transmission is relatively low. The fact that the woman was not wearing a mask does increase her risk of spreading the virus, but your protective measures help mitigate that risk. The Centers for Disease Control and Prevention (CDC) suggests that being in close contact (within 6 feet) with someone who is infected poses a higher risk, particularly if they are not wearing a mask.

3. Self-Monitoring: It is wise to monitor your health following potential exposure to someone who may be ill. Keep an eye out for any symptoms of COVID-19, such as fever, cough, shortness of breath, fatigue, or loss of taste or smell. If you develop any symptoms, it would be prudent to get tested for COVID-19 and follow local health guidelines regarding isolation and quarantine.

4. Health Management: Given the ongoing nature of the pandemic, practicing good hygiene is essential. This includes frequent handwashing, using hand sanitizer, and avoiding touching your face, especially after being in public spaces. If you feel anxious about potential exposure, consider limiting your time in crowded or enclosed spaces and maintaining physical distance whenever possible.

5. Mental Health Considerations: It's important to acknowledge that anxiety about COVID-19 is common. If you find that your worries are affecting your daily life, consider speaking with a mental health professional. They can provide strategies to manage anxiety and help you cope with the stress of the pandemic.

6. Community Safety: Encourage those around you to adhere to public health guidelines, such as wearing masks and practicing social distancing, especially in crowded places. This collective effort can help reduce the spread of the virus in your community.

In conclusion, while the risk of transmission in your situation appears low due to the precautions you took, it's always best to stay vigilant and monitor your health. If you have further concerns or develop symptoms, don't hesitate to reach out to a healthcare provider for guidance. Remember, staying informed and practicing preventive measures are key to navigating this pandemic safely.

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