Which of the following statements in relation to immunisations are true? Select 3 options.

Here are the true statements in relation to immunisations:

• They protect you and your family from preventable infections
• They protect your colleagues from preventable infections
• They protect vulnerable patients from preventable infections

Immunisations work by stimulating your immune system to produce antibodies, providing direct protection against specific diseases. This also contributes to herd immunity, which reduces the spread of infection in the community, thereby protecting family members, colleagues, and especially vulnerable individuals who cannot be vaccinated or may not mount a strong immune response.

The statement "The flu vaccine is known to cause flu in some people" is incorrect. Flu vaccines contain inactivated (killed) viruses or parts of viruses, or a weakened live virus (nasal spray) that cannot cause influenza illness. Any mild symptoms experienced after vaccination are typically side effects as the immune system builds protection, not actual flu.

The final answer is $\boxed{\text{They protect you and your family from preventable infections; They protect your colleagues from preventable infections; They protect vulnerable patients from preventable infections}}$.