Herd Immunity

Originally posted on Jarlath O'Brien:

The last few years has seen a rise in the number of cases of measles in the United Kingdom. The reduction in the percentage of children being vaccinated, either with MMR or with the single measles vaccine, makes it easier for the virus to spread and this has prompted action from policy makers and health professionals.

Vaccination works on herd immunity, meaning that a certain percentage of the population need to be vaccinated to make it extremely difficult for the virus to spread. This varies from virus to virus, but for measles herd immunity is achieved when 95% of the population are vaccinated. Above this number everyone’s happy. Below it, things start to happen.

In this case 95% can be effectively considered to be ALL.

In the field of education it is obvious that the only figure we can use to define all children is 100%. Unfortunately politicians develop policies that…

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Cross stitch #3 day 26


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March 30, 2015 · 21:35

Cross stitch #5 day 5


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March 28, 2015 · 23:50

#100WCGU #172 – storm

Finally, getting back in the swing of the 100 Word Challenge. This week the prompt was ‘when the daylight returned the king was dead’


It was a wild morning in the hills. The wind whipped around, a storm was clearly brewing. The sun tried valiantly to get through the cloud, to no avail. It got darker and darker, and a piercing scream was heard. After an hour the storm passed. When the daylight returned the king was dead, lying at the bottom of a steep gully on the hillside. He had been out for a walk when the storm arrived, trying to take the perfect photo of the sky. His camera lay beside him, and when the film was developed, a shadowy figure appeared on the final shot.
Did he fall?


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Cross stitch #3 day 25


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March 23, 2015 · 22:19

Cross stitch#5 day 4


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March 22, 2015 · 13:37

Clean air 4

This week we were looking at the effects of acid rain on the environment – tricky without the vocab in place already!

The experiment involved putting acid onto marble chips and observing the bubbles/fizzing and the size change of the chips. To check the students knew the words ‘fizz’ and ‘bubble’ they listened to a glass of coke first and described what they heard

Clean air (4) powerpoint

marble chips acid worksheet

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