| http://www.w3.org/ns/prov#value | - When the viral infection has settled, symptoms such as a cough or feeling congested may last for several weeks.In general, there is no need to consult a doctor unless people think they are becoming worse rather than better or develop new or worrying symptoms, like coughing up blood, Dr Baker says.??? Sore throatsMore than 90 per cent of sore throats (pharyngitis or tonsillitis) are caused by viral
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