Which of the vitamins A,D,E and K is fat-soluble?

Dr Rushworth quoted advice from Professor Gøtsche about new drugs.  How long did Prof Gøtsche say you should wait before using a newly invented drug?

What does the evidence say about the effectiveness of cloth face coverings?

What is it that causes viruses to become less of a threat over time?

Dr Rushworth said that current vaccines against SARS-Covid-2 are less effective than natural immunity.  What reason did he give?