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You should always avoid mosquito bites to reduce the risk of all mosquito-borne diseases. Fatal cases of yellow fever in unvaccinated travellers to Africa and South America continue to be reported. Symptoms of yellow feverThe first symptoms of yellow fever appear 3 to 6 days after exposure to the virus. These symptoms are known as stage one of the disease and include: These symptoms last for 3 to 4 days and then settle over one to 2 days. In mild cases, the infection ends after stage one as the virus is cleared. But in severe cases of yellow fever, this remission period is followed by serious symptoms and complications known as stage 2. Complications of yellow feverIn 15 to 25% of cases of yellow fever, severe symptoms develop, even if there has been a remission period. This is known as stage 2 and occurs because the yellow fever virus has the ability to infect organs such as the liver, heart and kidneys. This is also known as the ‘toxic’ stage of the infection and about half of the people who reach this stage will die. The severe complications include: Immunisation against yellow feverIf you are travelling or passing through areas infected with yellow fever, some countries require you to be vaccinated. A record of your immunisation must be entered and validated in your International Certificate of Vaccination or Prophylaxis by a healthcare provider that is authorised by the WHO to vaccinate against yellow fever. Although some countries have no entry requirements, others may require proof of vaccination for all travellers in order to satisfy entry requirements. You can find out if the countries you intend to visit have requirements for yellow fever vaccination by checking the Australian Government Department of Foreign Affairs and Trade's Smartraveller or asking your GP (doctor) when you have your appointment. It is best to arrange an appointment with your GP or a travel clinic doctor 6 to 8 weeks prior to departure in case a series of vaccines are needed. Yellow fever vaccine should be given at least 10 days before entering a country where immunisation is a legal requirement in order to avoid quarantine procedures.Immunisation against yellow fever only requires a single dose of vaccine, which usually gives most people lifetime immunity. Also, in most cases, once you have been vaccinated, the certificate is valid for life. People who should receive yellow fever vaccinationPeople who should be vaccinated for yellow fever include:
People who should not receive yellow fever vaccinationThe vaccine is not suitable for everyone and should not be given to people who:
Pregnancy and yellow fever immunisationImmunisation against yellow fever is not usually recommended for women who are pregnant or breastfeeding babies under 9 months of age. Speak with your doctor if you are pregnant and unable to avoid travel to an area where yellow fever is widespread. Pre-immunisation checklistBefore receiving the vaccine, tell your doctor or nurse if you or someone in your care:
Immunisations against yellow fever are generally effective and safe, although all medications can have unwanted side effects. Side effects from the vaccine are uncommon and usually mild, but for up to 5 to 10 days after vaccination may include:
Many vaccine injections may result in soreness, redness, itching, swelling or a burning sensation at the injection site for one to 2 days. Paracetamol might be required to ease the discomfort. There are a number of treatment options that can reduce the side effects of the vaccine, including:
If a reaction following immunisation is unexpected, persistent or severe, or if you are worried, see your GP (doctor) or immunisation provider as soon as possible ,or go directly to a hospital. In Victoria, immunisation side effects may be reported to SAEFVIC – the central reporting service for any significant adverse events following . You can discuss with your immunisation provider how to report adverse events in other states or territories. It is also important to seek medical advice if you (or your child) are unwell, as this may be due to other illness rather than because of the vaccination. There is a very small risk of a serious allergic reaction (anaphylaxis) to any vaccine. This is why you are advised to stay at the clinic or medical surgery for at least 15 minutes following immunisation, in case further treatment is required. Two very rare side effects associated with the yellow fever vaccine are inflammation of the brain (meningoencephalitis) and organ failure (viscerotropic disease). People over 60 years of age are at a small risk of these rare side effects, and people with thymus disorders are at increased risk of viscerotropic disease. Immunisation and HALOThe immunisations you may need are decided by your health, age, lifestyle and occupation. Together, these factors are referred to as HALO. Talk to your GP (doctor) or immunisation provider if you think you or someone in your care has health, age, lifestyle or occupation factors that could mean immunisation is necessary. You can check your immunisation HALO using the Immunisation for Life infographic. Avoid mosquito bitesAnother way to help reduce the risk of yellow fever and other mosquito-borne diseases is to avoid mosquito bites. Whether or not you need to be vaccinated, it is always a good idea when travelling to protect yourself and those in your care against mosquito bites. There are a few simple ways to avoid getting bitten by mosquitoes including:
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