On 2016-05-31 11:19 AM, graham wrote:
> On 31/05/2016 4:45 AM, Ophelia wrote:

>> I hadn't heard of that. I had to look it up!
>>
> They gave it to girls at first then they realised that boys can become
> carriers too.
>


While boys may be carriers, the risk factor for women are about 15 times
higher. That means that is much more important for the girls to have it
than the boys. In theory, an innoculated woman should not be at risk.