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Showing posts from July, 2021

What are the arguments in favour of reducing the gap between doses of the Pfizer Covid-19 vaccine to 3-4 weeks?

Early on during the pandemic, the UK government took the decision to give second doses of the Pfizer Covid-19 vaccine after 12 weeks rather than the recommended 3-4 weeks. It has now reduced the gap to 8 weeks and is considering reducing the gap to 3-4 weeks. What are the arguments in favour of reducing the gap between doses to 3-4 weeks? 1. Giving the two doses of the Pfizer vaccine 3-4 weeks apart is in line with the manufacturer’s guidance. 2. This is what most other countries using the Pfizer vaccine are doing. 3. Evidence from randomised controlled trials and subsequent evidence from real-world data provides strong evidence that two doses of Pfizer vaccine given 3-4 weeks apart provide excellent protection against severe disease. 4. Data from PHE in England shows that two doses of vaccine provide much better protection against the delta variant than one dose. Hence, giving second doses after 3-4 weeks instead of after 8-12 weeks could help reduce the current ratee of infection in ...

Why we should continue to wear face masks

The government’s chief medical officer says he will continue to wear a face mask when appropriate. We should follow his example. Covid-19 is an infection that is largely spread indoors – particularly in crowded, poorly ventilated areas – through inhaling droplets and aerosols produced by infected people when they cough, sneeze, sing, talk, or breathe. Face masks are a simple method of reducing the risk of infection – but only if they are worn by large numbers of people. The main function of a mask is to reduce the emission of droplets from infected people into the air. The droplets are captured by the mask and hence less virus enters the air. Much of the benefit of wearing face masks goes to other people but they can also benefit the wearer, particularly if a high-specification mask is worn that filters out more droplets when the wearer breathes in air.  Wearing face masks will reduce the spread of the coronavirus and help protect others. This is very important in settings where we...

Lifting of Covid-19 restrictions in England - What are the implications for public health?

  Why are all restrictions being lifted even though Covid cases are rising? The number of cases of Covid-19 has been increasing since May and there are now nearly 30,000 cases each day in the UK. In the past, such a high number of cases would have led to a large number of people admitted to hospital and also an increase in deaths. Fortunately, because of vaccination, the number of people with a severe Covid-19 illness is now much lower than previously. For example, in the last week, there have been around 20 deaths per day on average from Covid-19 across the UK. This compares to more than 1,000 deaths per day during some days in January. The number of hospital admission is also low, with around 300 hospital admission each day in the UK. The government believes that vaccination is breaking the link between the number of cases and the number of people with severe illness; and it therefore safe to end Covid-19 restrictions in England on 19 July. The government accepts that the numbe...