Some learn to read with relative ease. For others, it is a slower process which will develop over a number of years from beginner to more mature reader to mature reader. Others may continue to find it difficult, but attaining functional literacy is vital by adulthood. Even after attaining functional literacy, skills can still improve.
Learning to read is a relatively complex process. Learning to read early is something which may run in families. Likewise, difficulty with learning to read has been shown to have a family dimension. Almost all people can learn to read.