How long should you stay off work when you are sick?Â

From sniffles and colds to more serious afflictions, it seems like diseases are constantly spreading at this time of the year. 

So if you are feeling under the weather, here are the government's guidelines for when you should stay off work and for how long. 

The guidelines reveal that depending on your illness, your time off work should vary '“ often to keep diseases from spreading. 

Here's what they say: 

Influenza

Influenza, commonly known as flu, is very infectious and easily spreads in crowded populations and in enclosed spaces.

Flu viruses are always changing so this winter's flu strains will be slightly different from last winter's.

Symptoms include headache, fever, cough, sore throat, aching muscles and joints and tiredness.

Cases are infectious 1 day before to 3 to 5 days after symptoms appear.

Here's how long to stay off work: There is no precise exclusion period. If you have symptoms of influenza are advised to remain at home until you have recovered.

Chicken pox (shingles)

Chickenpox is highly infectious and shingles is spread by direct contact with fluid from blisters.

It cannot produce shingles in another person but the virus can spread to those who never had chickenpox from fluid in the blisters of a case.

Symptoms include sudden onset with fever, runny nose, cough and a generalised rash. 

Here's how long to stay off work: Cases of chickenpox are generally infectious from 2 days before the rash appears to 5 days after the onset of rash.

Although the usual exclusion period is 5 days, all lesions should be crusted over before returning to work. 

A person with shingles is infectious to those who have not had chickenpox and should be excluded from work if the rash is weeping and cannot be covered or until the rash is dry and crusted over.

Food poisoning

Food poisoning is a general term for gastrointestinal infections caused by consuming contaminated food or drink.

Person to person spread of these infections is unusual.

Symptoms include feeling sick (nausea), vomiting, diarrhoea, stomach cramps and fever.

Here's how long to stay off work: Adults with diarrhoea should be excluded until 48 hours after the diarrhoea and vomiting has stopped and they are well enough to return.

For some infections, longer periods of exclusion from work are required and there may be a need to obtain microbiological clearance. For these groups your local Health Protection Team will advise.

All outbreaks of food poisoning need to be investigated in order to identify their cause.

Giardia

This parasitic disease is spread from those with the infection to others by the faecal-oral route. It may also be spread by drinking water contaminated with faeces. Infection with giardia may not cause any symptoms. The incubation period is between 5 and 25 days.

When symptoms do occur, they may include abdominal pain, bloating, fatigue and pale, loose stools. Cases need to be treated with antibiotics.

Here's how long to stay off work: Adults should be excluded until 48 hours after symptoms have stopped.

Salmonella

Salmonella is a caused by eating contaminated food, particularly poultry or eggs. It can also be spread directly from person to person by the faecal-oral route.

Symptoms include diarrhoea, headache, fever and sometimes vomiting. 

Infection can be more serious in the very young and very old.

The incubation period can be from as little as 6 hours up to 72 hours (most commonly 12 to 36 hours).

Here's how long to keep your child off: You should be excluded until 48 hours after symptoms have stopped.

Typhoid and Paratyphoid fever

These are less common but serious illnesses.

They are spread by consuming food or water contaminated by the faeces or urine of someone with the illness or someone without symptoms who may be excreting the organism.

These infections are most commonly acquired abroad.

Symptoms of typhoid fever are tiredness, fever and constipation, whereas those of paratyphoid fever are fever, diarrhoea and vomiting.

The severity of the illness and length of the incubation period (typhoid 1 to 3 weeks, paratyphoid 1 to 10 days), are related to the number of infecting organisms ingested.

Here's how long to stay off work: Environmental health officers or your local Health Protection Team will advise.

E. coli

Escherichia coli (E. coli) are bacteria that live in the gut of humans and animals, particularly cattle and sheep.

A few strains of E. coli, such as VTEC can produce toxins that lead to more serious and potentially fatal illness.

Spread is by eating contaminated food, direct contact with animals and by faecal-oral route from an infected person as a result of sharing towels and food.

Spread by contaminated drinking has also been reported.

Symptoms vary depending on the severity of the infection but include diarrhoea, abdominal cramps, headache and bloody diarrhoea.

The incubation period is 1 to 10 days and cases are infectious as long as bacteria are present in the faeces.

Here's how long to stay off work: The standard exclusion period is until 48 hours after symptoms have resolved.

However, some people pose a greater risk to others and may be excluded until they have a negative stool sample(s) for example food handlers, and care staff working with vulnerable people.

The HPT will advise in these instances.

Diarrhoea and vomiting (Gastroenteritis)

Diarrhoea has numerous causes but diarrhoea caused by an infection in the gut can be easily passed to others.

Diarrhoea is defined as 3 or more liquid or semi-liquid stools in a 24 hour period.

Here's how long to stay off work: Adults with diarrhoea or vomiting should be excluded until 48 hours after symptoms have stopped and they are well enough to return.

If medication is prescribed, ensure that the full course is completed and there is no further diarrhoea or vomiting for 48 hours after the course is completed.

For some gastrointestinal infections, longer periods of exclusion from school are required and there may be a need to obtain microbiological clearance. For these groups, your local HPT or environmental health officer will advise.

If  have been diagnosed with cryptosporidium, you should NOT go swimming for two weeks following the last episode of diarrhoea.

Glandular fever

Glandular fever is caused by the Epstein-Barr virus.

Symptoms include evere tiredness, aching muscles and sore throat, fever, swollen glands and occasionally jaundice (yellowing of the skin and eyes).

In children, the disease is generally mild and difficult to recognise.

The incubation period is 4 to 6 weeks but the infectious period is not accurately known.

Duration of the illness is from 1 to several weeks or months.

Here's how long to stay off work: Exclusion is not required and you can return once they feel well.

Hand, foot and mouth disease

Hand, foot and mouth disease is a common viral illness in childhood. It is generally a mild illness caused by an enterovirus.

In very rare instances it can be more sever. 

The child usually develops a fever, reduced appetite and generally feeling unwell.

One or two days after these symptoms a rash will develop with blisters on their cheeks, hands and feet. Not all cases have symptoms.

The incubation period is 3 to 5 days.

Here's how long to stay off work: You should stay off work until you are feeling better, there is no need to stay off until the blisters have all healed.

Staying off work for longer periods is unlikely to stop the illness spreading.

Impetigo

Impetigo is an infectious bacterial skin disease and may be a primary infection or a complication of an existing skin condition such as eczema, scabies or insect bites.

Impetigo is common in children, particularly during warm weather.

The infection can develop anywhere on the body but lesions tend to occur on the face, flexures and limbs not covered by clothing.

Here's how long to stay off work: You should be excluded from work until the lesions are crusted and healed or 48 hours after commencing antibiotic treatment.

Measles

Measles is a highly infectious viral infection.

The mumps, measles-rubella (MMR) immunisation campaign carried out in the UK 1994 resulted in a dramatic reduction in cases of measles. 

Symptoms include a runny nose; cough; conjunctivitis (sticky eye); high fever and small white spots (Koplik spots) inside the cheeks. Around day 3 of the illness, a rash of flat red or brown blotches appear, beginning on the face and spreading over the body.

The incubation period is between 7 to 18 days.

Here's how long to stay off work: Cases are infectious from four days before onset of rash to four days after so it is important to ensure cases are excluded during this time. 

Mumps

Mumps is a viral infection. The first symptoms of mumps are usually a raised temperature and general malaise.

Following this there is stiffness or pain in the jaws or neck.

Then the glands in the cheeks and under the jaw swell up and cause pain. The swelling can be one sided or affect both sides.

Mumps can cause swelling of the testicles and rarely, infertility in males over the age of puberty.

Here's how long to stay off work: You can return to work 5 days after the onset of swelling, if well.

Rubella (German Measles)

Rubella is a viral infection.

The symptoms of rubella are mild. Usually the rash is the first indication, although there may be mild catarrh, headache or vomiting at the start.

The rash takes the form of small pink spots all over the body.

There may be a slight fever and some tenderness in the neck, armpits or groin and there may be joint pains.

The rash lasts for only 1 or 2 days, and the spots remain distinct, unlike measles.

Here's how long to stay off work: Exclude for 5 days from the appearance of the rash.

Scabies

Scabies is a skin infection caused by tiny mites that burrow in the skin. 

The appearance of the rash varies but tiny pimples and nodules are characteristic.

Secondary infection can occur if the rash has been scratched.

The scabies mites are attracted to folded skin such as the webs of the fingers.

Burrows may also be seen on the wrists, palms elbows, genitalia and buttocks.

Here's how long to stay off work: The infected adult should be excluded until after the first treatment has been carried out.

Scarlet Fever

A wide variety of bacteria and viruses can cause tonsillitis and other throat infections. 

There is acute inflammation extending over the pharynx or tonsils.

The tonsils may be deep red in colour and partially covered with a thick yellowish exudate.

The illness symptoms vary but in severe cases there may be high fever, difficulty in swallowing and tender enlarged lymph nodes.

Here's how long to stay off work: If no antibiotics have been administered the person will be infectious for 2 to 3 weeks.