This afternoon my daughter took us to a nearby county medical center to have our second COVID shot.(My wife and I must take turns because one of us had to stay at home to babysit our granddaughters.)  

There were only few persons on standby at the center when we arrived, and all I had to do was to fill out some questionaires and then to get the shot of a Pfizer.  I told the workers that I had already taken an AZ eight weeks ago in Taiwan, after a short discussion among them, they said it is okay to have a different one.  The shooting itself was so quick that I got a nothing-on-it feeling before it had done.  Then I proceeded to another counter to make the appointment for the second shot three weeks later.  (Actually it will be my third shot.)  After ten minutes rest, we left.  

I heard that the seniors over 72 years old can get a Moderna soon in Taipei.  Well, the mire of vaccine shortage in Taiwan and the aboundace in the US can be bascically boiled down to the law of demand and supply.