COVID-19 Transmission Risks in Shared Spaces

Transmission potential of COVID-19?

Hello, doctor.
I am a university student, and since the pandemic, I have become very anxious about the possibility of getting infected.
I always wear a mask at school, but some international students do not wear masks.
For example, today at lunchtime in the student cafeteria, while I was waiting in line for the buffet, three international students suddenly came up behind me, not wearing masks and talking loudly.
I would like to ask you, doctor, even though I was wearing a mask, is there a significant risk of transmission in such a situation, given that it lasted about three minutes? Later, one of them suddenly cut in front of me, but I didn't want to argue with them.
I also live with my grandparents at home, and I am very afraid of putting them at risk, so I keep my mask on at school except when eating or drinking.
I am not sure if it is psychological, but I feel like my throat is a bit scratchy, although it improved after drinking water.
However, I am still worried and would like to hear your professional opinion, as well as how you would protect yourself.
Thank you!

Miu Miu, 20~29 year old female. Ask Date: 2020/09/23

Dr. Hong Yuanbin reply Internal Medicine

Hello, based on your description, it seems that you were in an open space and had approximately 3 minutes of contact with an international student.
However, since you were wearing a mask the entire time, the risk of infection should be very low.
You can further enhance your safety by practicing good hand hygiene and avoiding direct exposure to respiratory droplets when the other person is speaking.
You should be fine.
Thank you for your question.

Reply Date: 2020/09/23

More Info

Hello! It's completely understandable to feel anxious about COVID-19 transmission, especially in shared spaces like your university cafeteria. Let's break down the situation based on current medical knowledge regarding COVID-19 transmission and the precautions you can take.

Firstly, COVID-19 primarily spreads through respiratory droplets produced when an infected person coughs, sneezes, talks, or breathes. The virus can also spread via aerosols in enclosed spaces, particularly when ventilation is poor. However, the risk of transmission decreases significantly when both parties are wearing masks, as masks act as a barrier to these droplets.

In your case, since you were wearing a mask while the foreign students behind you were not, the risk of transmission is relatively low. The fact that you were only in close proximity for about three minutes further reduces the likelihood of infection. It's important to note that the virus is less likely to spread if the other individuals are not exhibiting symptoms, such as coughing or sneezing, which can release larger quantities of viral particles into the air.

Your concern about your grandparents at home is valid, as older adults are at a higher risk for severe illness from COVID-19. To protect them, you can take several precautions:
1. Continue Wearing Masks: Keep wearing your mask in crowded or enclosed spaces, especially where social distancing is difficult. This is a simple yet effective way to reduce your risk of exposure.

2. Practice Good Hygiene: Wash your hands frequently with soap and water for at least 20 seconds, especially after being in public places. If soap and water are not available, use hand sanitizer with at least 60% alcohol.

3. Maintain Distance: Try to keep a safe distance from others, especially those who are not wearing masks. If you feel uncomfortable in a crowded situation, it’s okay to step away or find a less crowded area.

4. Monitor Your Health: If you start experiencing symptoms such as a sore throat, cough, or fever, it’s important to get tested for COVID-19 and self-isolate until you receive your results.
5. Stay Informed: Keep up with local health guidelines and recommendations regarding COVID-19, as these can change based on the current situation in your area.

Regarding your throat discomfort, it’s common to feel anxious and hyper-aware of bodily sensations during this time. If drinking water alleviates the discomfort, it may simply be due to dryness or irritation rather than an indication of infection. However, if the symptoms persist or worsen, consider consulting a healthcare professional for further evaluation.

As for how I would protect myself, I would follow similar guidelines: wearing a mask in crowded places, practicing good hand hygiene, maintaining physical distance, and staying informed about the latest health recommendations. It's also important to ensure that my vaccinations are up to date, as vaccines significantly reduce the risk of severe illness and transmission.

In summary, while your situation does present some risk, the precautions you are taking—such as wearing a mask and being mindful of your surroundings—are effective strategies to minimize that risk. Continue to prioritize your health and the health of those around you, and don’t hesitate to reach out for support if your anxiety becomes overwhelming. Stay safe!

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