I recently read about two studies that indicated that after getting over covid-19, antibodies appear to drop off considerably within 3-4 months. It varied depending on the patient's response (severity of symptoms), but this early study indicated that people may be able to get the virus again within 3-4 months. I don't know if this will impact the duration of a vaccine's ability protect from future infections, but it's concerning.
I have travelled enough and read enough that I know Americans are not always seen in the best light. Watching how both our elected officials and a lot of our general public has and is handling this epidemic doesn't exactly make me proud as an American.
I agree with the general notion that continued economic shutdown is unrealistic, but I also think we could do a much better job of mitigating our risk of spreading the virus. Even if you don't believe masks are very effective, I don't understand why people can't or won't wear them in public. Even worse, here in Florida, they often won't even respect the 6 ft social distancing and when you call them out, they get offended. The arrogant/ignorant North American stereotype personified. We are over 120,000 deaths in the US, even if this number is inflated by less than accurate reporting, what number will it take to get people to take this more seriously?