Your coronavirus questions answered
There have now been more than 40,000 cases of coronavirus, which has been declared a global health emergency. The disease has spread to many countries,Once you've had coronavirus, will you then be immune? Denise Mitchell, Bicester
When people recover from an infection their body is left with some memory of how to fight it should they encounter it again. This immunity is not always long-lasting or totally efficient, however, and can decrease over time. It is not known how long immunity might last after being infected.Coronavirus and flu share many similar symptoms, making it difficult to diagnose without a test. The main coronavirus symptoms to look out for are fever and a cough.
Anyone who suspects they may have caught coronavirus, because they have had close contact with another infected person or have travelled to an area where the virus is circulating, should talk to their doctor.It is not clear yet whether this is a route of transmission that we should be concerned about. Currently, it is coughs and sneezes from an infected person that are thought to be the main source of spread.
Is a face mask useful against the virus and how often does it have to be replaced? Tom Lim, Bali, Indonesia There is very little evidence that wearing face masks makes a difference. Experts say good hygiene - such as regularly washing your hands and certainly before putting them near your mouth - is vastly more effective.The World Health Organization says the incubation period, which is the time before symptoms appear, ranges from two to 10 days.
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