What do the numbers mean !
First data from Pfizer vaccine. The Indian Variant (now referred to as ‘Delta’) is recognised as being highly transmissible and, as a consequence, it is now the predominant variant in the UK and elsewhere. The question in many people’s minds is whether, despite the rising number of cases, those who have been fully vaccinated will still […]
Amongst the unsung research heroes for tackling this pandemic have been waste water engineers and geographers. Examining sewage for traces of the virus has been a truly worldwide effort that is now a key component for managing the pandemic. In this post I address the background and the questions raised by this development. How is sewage testing […]
Hitting the headlines this week is news about yet another mutant strain, particularly newsworthy because of the accelerating tragedy of the pandemic in India. This variant is now present in 40 countries. What do we know about this strain, its impact and in particular any possibility that the success of the vaccines could be imperilled? Is […]
That vaccines can protect against Covid-19, in its severe forms, is well established from clinical trials. Questions remained as to whether (i) when applied to the wider population, these benefits would hold, (ii) vaccines could reduce transmission and asymptomatic infection and (iii) in the ‘real world’ these benefits would be achieved after allowing a return to […]
One of the tragic aspects of the news about the escalating pandemic in India is the relatively high proportion of children and young people, not just in the number of cases overall, but also – unexpectedly given Western experience – amongst those with serious infection. This raises the issue as to the possibility of children being […]
As vaccination progresses in most countries, there is still the concern that although the vaccines protect against severe infection, they are less successful in preventing transmission, especially with the so-called “variants of concern”. Yet experts are even this week arguing as to what is the most important route for catching the virus. Public confidence and adherence to […]
Vaccine roll out success, coupled with adherence to behavioural rules, has led to substantial declines of infections in the UK and Israel. Increasing vaccine coverage in North America and Europe is seen also as the route back to normality. Yet infectious disease epidemiologists are still worried about a third wave causing large numbers of severe cases. Are they […]
In my post earlier today, I stated that “it is possible that the risks of cerebral venous sinus thrombosis in younger women are greater than the risks from Covid-19 infection”. This afternoon, the regulator in the UK announced the results of their detailed calculation addressing this question. This is the result of their calculation and I […]
In my post on March 16, I considered the evolving information on rare blood clotting events in relation to the AstraZeneca vaccine. I concluded that the risk of pulmonary embolism, although higher with the AstraZeneca than the Pfizer vaccine, was no higher than that in the general population. Attention recently has focused on the rarer brain clotting […]
Two recent studies, one from the UK and the other from Denmark, have addressed the question as to how likely is it that having been infected with Covid-19 once, you can catch it again. The hope is that a previous infection would give sufficient immunity to protect against a second infection. How far is this the case? What did […]
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