Which statement best explains why the virus that causes dog flu does not infect humans? in other words, why is this type of flu specific to dogs?
group of answer choices

the toxins produced by the dog flu virus are not toxic to human cells.

the replication cycle of dog flu virus is must slower inside a human cell.

the dog flu virus interacts specifically with receptors on the surface of dog cells.

the dog flu virus does not often come into contact with human cells.

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Explanation:

For me is this one. The dog flu virus interacts specifically with receptors on the surface of dog cells.

In general, canine influenza viruses are thought to pose a low threat to people. To date, there is no evidence of spread of canine influenza viruses from dogs to people and there has not been a single reported case of human infection with a canine influenza virus.

However, influenza viruses are constantly changing and it is possible that a canine influenza virus could change so that it could infect people and spread easily between people. Human infections with novel (new, non-human) influenza A viruses against which the human population has little immunity are concerning when they occur because of the potential that a pandemic could result.

For this reason, the World Health Organization global surveillance system has led to detection of human infections by novel influenza A viruses of animal-origin (such as avian or swine influenza A viruses), but to date, no human infections with canine influenza A viruses have been identified.

But dogs can spread the flu from humans, if their owner has the flu.

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