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19 September, 05:38

Adrian caught a virus while staying with his grandmother. A few years later, his mother and sister got the same virus. This virus could spread through touch and direct contact. However, Adrian did not contract the virus this time, even though he was living with his mother and sister. Why did he not get sick?

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Answers (2)
  1. 19 September, 05:50
    0
    Because you don't get the same virus twice.
  2. 19 September, 05:53
    0
    what the dude said in the comment is correct
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