I've been asked several times in the past few weeks about the new Alzheimer's drug Lecanemab (marketed under the name Leqembi). It's obviously on peoples' minds, with questions like:    What's the hype all about and why is it getting so much attention?    Is this drug suitable for my friend or parent?    Does it actually cure Alzheimer's?   Is it safe?    How much does it cost?   These are some important questions, so I'll sum things up for you.     Lecanemab is the first Alz