I am herewith postng a list of a series of publicatons that have been instrumental in providing enlightening insights on the interplay between Covid-19 and the host immune system. They provide so to speak critcal pieces of the puzzle that I have been putng together. Entre puzzles are rarely published. That’s why publicatons rarely bring solutons to complex problems. For your convenience, I have allocated the publicatons I consulted to diferent categories. As you will appreciate, I have been tapping into several disciplines. To ‘solve’ a problem as complex as a viral pandemic, one has to draw from several diferent felds, including epidemiology, (molecular) biology, virology, immunology, genetcs, vaccinology and even biophysics. Again, this is why ‘fnished’ puzzles cannot be found inscience journals specifcally dedicated to a specifc feld of interest.