"Whopping cough communication"

I recently received a letter from the practice asking women who were 20-32 weeks pregnant to make an appointment to have the whopping cough vaccination to protect the unborn child, particularly as there has been an increase in the number of whopping cough cases.

I was confused at having received the letter and had to explain to my husband that I was not in fact pregnant.

I am a 51 year old, menopausal woman, so getting this letter threw me.

It was not clear if this was a standard letter sent to all women of a certain age or whether it had been sent to me by mistake.

My concerns are:

1) what details are on my medical records, which indicate I am pregnant if this is not a standard letter?

2) If this is a standard letter sent to all female patients, then it should say so and ask you to ignore it if not pregnant.

3) Sending a letters can be expensive, surely there are another ways of communicating with large numbers of patients (GDPR notwithstanding).