I found that I have made a big mistake when instructing people to use "as follows". It is used to introduce a list of things that you will mention next. Here are the sentences I made:
SARS used to break out in Taiwan a couple of years ago. It had claimed many people's lives throughout the island during its raging. To prevent us from getting SARS, my suggestions are as follows: wearing a mask all the time, cleaning your hands before eating, taking your temperature on a regular basis, etc.
Please note that you have to use "follows" instead of "follow" to indicate many things in the passage. Let me apologize again for the mistake I made earlier in my classes. Sorry about that.