The size of the antenna loop limits the minimum size of the RFID label.
This is not to say that the technology cannot evolve. Till then, an investment in a memory training course may have to serve.
The technology has evolved. The antenna has shrunk to the size of a grain of rice. An implantable RFID chip (@USD200) is already in the market. However, some concerns re privacy remain.
The following appeared in the Washington Post:
Use of Implanted Patient-Data Chips Stirs Debate on Medicine vs. Privacy
By Rob Stein
When Daniel Hickey's doctor suggested he have a microchip implanted under his skin to provide instant access to his computerized medical record, the 77-year-old retired naval officer immediately agreed.
To view the entire article, go to http://www.washingtonpost.com/wp-dyn/co ... ailarticle