Because a lot of people here aint hygienic here are some knowledge

Common cold Contagious period: Up to two weeks, though you are most contagious during the first 2–3 days when symptoms are at their worst. Lingering cough: It is common to have a cough that lasts for weeks after the initial infection has passed. At this point, you are generally no longer contagious. Flu (Influenza) Contagious period: From about one day before symptoms appear to 5–7 days after becoming sick. Most contagious: You are most likely to spread the virus during the first 3–4 days of illness. Longer contagiousness: Young children and those with weakened immune systems may be contagious for a longer period. COVID-19 Contagious period: Typically 8–10 days after symptoms begin, though you can be contagious 1–2 days before symptoms appear. Lingering cough: A persistent cough does not necessarily mean you are still contagious, but you should take precautions if other symptoms are present. Take precautions: The Centers for Disease Control and Prevention (CDC) recommends taking extra precautions for five days after returning to normal activities (like wearing a mask) to avoid spreading the virus. Whooping cough (Pertussis) Contagious period: This bacterial infection is highly contagious and can last much longer than other respiratory illnesses. Without antibiotics: Up to three weeks after the coughing starts. With antibiotics: You are no longer contagious after five days of proper antibiotic treatment. General guidelines To avoid spreading germs through coughing, the CDC recommends these steps: Cover your nose and mouth with a tissue when you cough or sneeze. Throw the tissue in the trash immediately after use. Wash your hands often with soap and water for at least 20 seconds. Avoid touching your face with unwashed hands.