Factors influencing viral tissue tropism include:
- The presence of cellular receptors permitting viral entry.
- Availability of transcription factors involved in viral replication.
- The molecular nature of the viral
The cellular receptors are the proteins found on a cell or viral surface. These receptors are like keys, allowing the viral cell to fuse with or attach itself to a cell. The way that these proteins are acquired is through a similar process to that of an infection cycle.