The doc at the Medical City says it may have been caused by the changing weather (hot and then cold or vice-versa), causing our bodies to catch-up in adjusting to the temperature.
This particular flu virus(?) may be the strongest one I've had yet, causing me to have chills, never-ending cough and cold, and panghihina. This resulted me to take 3.5 days sick-leave last week.
The only good side to this flu was that I've lost a little weight (yey!) kase nga madalas walang gana kumaen. Hopefully by end of this week I'm fully recovered.