There have been concerns that lunar new year may cause the current wave of COVID infections in China to spread much further and faster. But the worst has likely passed.
Clinically vulnerable people tended not to respond as well after the first and second shots, but their immunity rises to greater levels with a booster.
The repeated lesson from other countries is that the loss of immunity and the appearance of new variants make herd immunity a futile goal when it comes to COVID.
Deep-seated structural issues in the NHS affect all patients, however they particularly impact people with long COVID who are trying to both understand a complex new illness and access healthcare.
A new study has looked at more than 15,000 people across 21 countries to assess whether vaccinated and unvaccinated people discriminate against each other.