Thus, while taking drugs such as aspirin, paracetamol or ibuprofen can alleviate a fever, doing so may mean the body will need more time to fight an infection.
However, unless you have been told by your doctor that you should not take paracetamol it is now best practice to use it as the first choice of treatment for coronavirus symptoms - along with rest and plenty of fluids - rather than ibuprofen, with a recommended dose of a maximum of 8 tablets in 24 hours.
The WHO official made the remark after French Health Minister Olivier Veran warned that the use of ibuprofen and similar anti-inflammatory drugs could be "an aggravating factor" in COVID-19 infections.
French Prime Minister Edouard Philippe said the government had no other option after the public health authority said 91 people had died in France and nearly 4,500 were now infected.
But the company "has neither received new safety information nor been involved in the evaluation of any adverse events regarding the use of ibuprofen in COVID-19", according to the statement.
Dr Rupert Beale, Group Leader in Cell Biology of Infection at The Francis Crick Institute, said: "There is a good reason to avoid ibuprofen as it may exacerbate acute kidney injury brought on by any severe illness, including severe COVID-19 disease. The Society for Endocrinology has issued advice for patients who are taking hydrocortisone or other steroids for pituitary or adrenal deficiency".
Ian Jones, a professor of virology at the University of Reading, said that ibuprofen's anti-inflammatory properties could "dampen down" the immune system, which could slow the recovery process. The BBC has reported on other variations from France and Italy - all fabrications.
Ibuprofen is a drug that belongs to the group of nonsteroidal anti-inflammatory drugs and is used to reduce pain due to inflammation.
In general, the human body is able to fight infections better when its temperature is higher, which is the objective of a fever.
Experts have broadly welcomed this change of advice but stress that people should follow instructions from doctors about the medication they are taking.