This week's questions: 1:22 - What is your opinion of free public access to research articles? 3:13 - I was wondering what the cognitive symptoms of mild, moderate and severe dehydration were. 3:59 - I got my flu shot yesterday, and, curiosity and a Google search lead me to a report saying the 2015-16 cycle has been 60% effective. Is that good? Seems less than impressive. 5:01 - Why most universal health care coverage don't cover teeth? Treating my cavities is part of my health as much as treating the flu isn't it? 5:50 - Is there any good research on (moderate - heavy) weightlifting increasing bone density? And if it is, is this possibly a good way to decrease bone fractures in the general population? 6:43 - How do they make glasses for babies? I have to read a tiny line to get glasses but they make them for babies? 8:05 - Are all prenatal vitamins created equally? Some are $5, some are $20. What's the difference? 8:58 - I've had a cough going on 3 months now. All the doctors find is I have low potassium in my blood work and nothing on my xrays. Should I go to another hospital for their opinion? 9:46 - Advice on how to explain to friends/family that they don't know how to treat themselves better than their doctors do? 10:29 - I move all the time for school/work, so I'm constantly changing healthcare providers and I don't have a regular physician. How am I supposed to keep track of my medical history? 11:20 - For an otherwise healthy person, is there any good reason to endure a headache as opposed to knocking back some paracetamol/ibuprofen/aspirin? 12:18 - What is Tetralogy of Fallot, my nephew has it and nobody can explain it to me very well. 14:58 - Do antibiotics applied to the skin have the same effect as those ingested? I regularly treat skin infections this way. Should I stop? 15:43 - Olympics in Brazil, should it be cancelled because of Zika?