Answer:
1. pandemic, outbreak of infections disease
2. Fever, cold, cough, bone pain and breathing problems
3. Pandemics happen when new (novel) influenza A viruses emerge which are able to infect people easily and spread from person to person in an efficient and sustained way.
4.
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Answers & Comments
Answer:
1. pandemic, outbreak of infections disease
2. Fever, cold, cough, bone pain and breathing problems
3. Pandemics happen when new (novel) influenza A viruses emerge which are able to infect people easily and spread from person to person in an efficient and sustained way.
4.