You are free to decide whether you wish to accept an invitation to participate in screening. In making your decision, it is important to read the information materials provided with the invitation, and carefully consider the potential benefits and harms of screening. If you have any questions, discuss them with your doctor or health-care provider.
You should also bear in mind that regular screening increases the chance of finding cancer early and possibly saving your life. It is therefore recommended that you participate in organized screening programmes for which you are eligible every time you are invited.