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New model to predict effectiveness of livestock vaccines
The study has implications for the design of vaccines and vaccination programmes in livestock.

Researchers use model to study effectiveness of PSSR vaccines 

A new model to predict the effectiveness of vaccines in livestock has been developed by scientists at The Roslin Institute.

Researchers found that, when applied appropriately, even imperfect vaccines can prevent, mitigate or eliminate the prevalence of disease.

Scientists say the study has implications for the design of vaccines and vaccination programmes in livestock. Professor Andrea Wilson from the Roslin Institute explains:

“Veterinary vaccines often only confer limited immunity and thus may not prevent infection. In this study, we developed a model that combines epidemiological consequences of different vaccination strategies and different vaccine properties applied to livestock. 

“The model is successful in predicting the effectiveness of vaccines in livestock.”

The overall aim of vaccination is to protect animals from disease and reduce the risk of disease outbreaks. The new model shows that combining diverse vaccine properties could have a multiplicative effect and may, therefore, be more effective. 

In the study, scientists used the model to study the effectiveness of vaccines to combat Porcine Reproductive and Respiratory Syndrome (PRRS) virus.

Endemic in most pig-producing countries, PRRS causes breathing problems and can be fatal in young animals. However, vaccines to prevent the spread of the disease have mostly failed

Scientists believe the new model shows that the control or elimination of PSSR through vaccination may well be in reach, so long as the vaccine speeds up recovery and reduces virus replication.

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World Bee Day celebrations begin

News Story 1
 Today (20 May) marks the fifth annual World Bee Day, which raises awareness of the importance of bees and pollinators to people and the planet. Observed on the anniversary of pioneering Slovenian beekeeper Anton Jana's birthday, this year's celebration is themed: 'Bee Engaged: Celebrating the diversity of bees and beekeeping systems'.

Organisations and people celebrating the day will raise awareness of the accelerated decline in pollinator diversity, and highlight the importance of sustainable beekeeping systems and a wide variety of bees. Slovenia, the initiator of World Bee Day, will be focusing on teaching young people about the significance of pollinators. 

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News Shorts
Further avian flu cases confirmed

Three cases of highly pathogenic avian influenza (HPAI) H5N1 have been confirmed in recent days, bringing the total number of cases in England to 98.

On Thursday, the APHA confirmed two cases of HPAI H5N1 near Redgrave, Mid Suffolk and Market Weston, West Suffolk. A case H5N1 was also confirmed in poultry at a premises near Southwell, Newark and Sherwood, Nottinghamshire.

Protection and surveillance zones are in place around the affected premises. Further details are available at