2. Delaying the second dose for quite some time (perhaps months) might not harm the resultant immunity. 3. A single dose of the mRNA vaccines appears to offer up to 90 per cent protection. 4. We don’t know the optimum dose or timing of the vaccines. When new drugs are tested they want them to be effective so usually the drug companies maximize the dosing. If we put these together, we can speculate that if we gave everyone a single dose of half the recommended amount we could get four times as many people an initial dose of vaccine. People can then get their booster dose once everyone who wants the vaccine has had their first dose. If we get everyone to, say 80 per cent protection this should shut down the pandemic faster than getting one-quarter of us to 95 per cent.