Contagious Periods for Common Illnesses
COVID-19
Individuals infected with COVID-19 are most contagious in the days just before and after the onset of symptoms. The contagious period can vary, but here are some key points:
Typically, individuals are contagious 2 days before symptoms appear.
Contagiousness continues for about 10 days after symptoms begin.
People with severe illness or weakened immune systems may be contagious for longer.
Influenza (Flu)
Flu viruses are also highly contagious. Here’s when you are most likely to spread the flu:
Contagious 1 day before symptoms appear.
Most contagious in the first 3-4 days after the illness begins.
Can remain contagious for up to 7 days after becoming sick, especially in children and those with weakened immune systems.
Common Cold
The common cold is caused by various viruses, and its contagiousness can be summarized as follows:
Contagious 1-2 days before symptoms appear.
Most contagious during the first 2-3 days of illness.
Can remain contagious for up to 2 weeks, especially in children.
Norovirus (the stomach bug)
Norovirus is highly contagious and can spread quickly. Key points include:
Contagious from the moment you start feeling sick.
Can remain contagious for at least 2 days after recovery.
Some people may spread the virus for weeks or even months after recovery.
Strep Throat
Strep throat is caused by bacterial infection and is contagious as follows:
Contagious from the onset of symptoms.
Most contagious for the first 2-3 days of illness.
Can remain contagious until 24 hours after starting antibiotics.
Conclusion
Understanding when you are most contagious can help reduce the spread of illnesses. Always practice good hygiene and consult with healthcare professionals if you are unsure about your health status.
Original article https://www.cbsnews.com/news/covid-flu-contagious-period/
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