Hi,
It is possible that you may still be contageous. Spread by virus-infected droplets that are coughed or sneezed into the air, the flu is contagious. People infected with the flu are contagious from a day before they feel sick until their symptoms have resolved (usually about 1 week for adults, but up to 2 weeks for kids).
If you are concerned, then be extra careful around your father. Wear a mask if you can. Wash your hands frequently.
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