Do most families have someone in them who has/had cancer? are there actually many families without any cancer?

Cancer is common: This is true from the most highly-developed, medically-sophisticated families to the world's poorest poor, with young mothers dying without help from cancer of the cervix. Cancer is a family of diseases that result from accumulated genetic mutations, and is a fact of life for multicellular organisms such as ourselves. Thankfully, we now cure a majority of cancers.