When I had my speed prob I rang 3BB, couple of guys came out, they plugged in my LAN cable from the router into their laptop.....900Mbps..
That's when they did tests on my PC to find the bottlenecks....
Forgot, a security program was using a huge amount of CPU too, deleted it, job done..Used another..
In reality, it should say Sinovac barely effective for any. I can barely understand the need to get it at all, with the efficacy rate is provides. Some would argue it is better than nothing. It is really more evidence of the retrograde aspect of nearly all things Thailand.