That article says android is vulnerable yet doesn't provide any facts, so I'll provide some
1. Android is Linux
2. There are no active Linux viruses and haven't been for years
3. There is no such thing as a secure operating system
4. Malicious apps have been found in the Apple app store
5. Android apps are sandboxed, I hear Apple will implement this soon
6. Open source software is more robust because anyone can audit the code and report problems
7. Closed source software suffers from limited eyes on the code, problems go unnoticed
8. Security by obscurity is never a good thing
9. A Linux environment is hostile to viruses and that won't change regardless of how popular the platform becomes
10. The weakest link in any OS is the user. There is no substitute for education.
I've been using computers for 30 years and have been using and developing for Linux for 12 years. That article sounds like FUD to me.