Asymptomatische Infektion

Es ist schon mehr als 1 Jahr her. Die Einzelfallprüfung zur asymptomatischen Infektion war uns bekannt. Alle Alarmglocken hätten klingeln müssen. Aber weit über München scheint die anschließende Veröffentlichung im New England Journal of Medicine nicht ernsthaft gewürdigt worden zu sein. Mit #Covid-19 Infizierte Personen sind ansteckend bevor sie selbst Symptome zeigen. Heute freundlich begrüßt, infiziert und einige Tage später selbst erst die typischen Symptome. Das SARS-CoV-2-Virus hat die kommunikativ weit überlegene Species Homo sapiens einfach ausgetrickstSARS-CoV-2-Virus hat die kommunikativ weit überlegene Species Homo sapiens einfach ausgetrickst, indem es kommunikatives Handeln (Bisous,Bisous, talk, talk) als Schwäche ausnutzt für eine rapide Übertragung. Wir müssen nicht gleich ins Schweigekloster umziehen, aber unsere Kommunikation auf digitale Medien temporär umleiten. Das sollte uns doch nicht schwer fallen, wir haben damit die Technik das Virus zu übertrumpfen. Nur wollen müssen wir es. Das Leid der 52.000 CoronaToten und deren Angehörigen wird es nicht mehr lindern können, aber weiteres Leiden und die Arroganz der Überlebenden bleibt uns hoffentlich erspart. Daher heißt es jetzt: Klaus ist allein zuhaus.


Covid-19 USA

With almost 6 months into COVID-19 in the USA since the first official case, the public health situation is still scary. Data and figures from the official U.S. Department of Health & Human Services, particularly the recent data release from the Centers for Disease Control and Prevention show around 50.000 new cases of Covid-19 every day again (see figure).

By using the data and calculating a simple linear trend shows the following evolution in case no policy change occurs.

Using a seasonality in the calculation of about 3 weeks (=20days) the evolution looks much different with huge margins of error.

Hence, all is possible by chart analysis or the language of investors. Public health analysts would rather look at the disaggregated state by state or even county be county detailed analysis. A seasonality of 3 weeks could make sense. With a high level Covid-19 cases in one state people move (also with Covid-19) to other states for one week exporting the virus. After 2 more weeks incubation, case numbers rise in this receiving area, which will make visitors (and the virus) move back again. A oscilating pattern of the spread of the virus will result, making a nationwide lockdown much more likely. In natural sciences (Video-Link)we call this coupled oscillation, here of Covid-19 between several US-states. (take Florida and New York for example).
Now, let us apply the same simple statistical modelling to the international level. As we enjoy Summer in Europe , in the southern hemisphere of the world Winter, Covid-19 and the flu are spreading there now. When we shall move from Autumn to Winter, we might receive another wave of cases from the other part of the world.
Conclusion: Get prepared for another wave as of now. Helping the global South now, saves lives in Autumn and Winter also in Europe. Simple isn’t it. Let’s just act accordingly (the not so simple part). Train health care professionals (95.000 of them got infected in the US and 500 !!! died).

On Mortality in EU

It is normal business for demographers to deal with mortality and the statistics of mortality. The latest data I found from official European statistics from Eurostat refer back to 2015. They mention 571.000 potentially avoidable deaths in the Europen Union of the 1.7 Million deaths among the population younger than 75 years of age, the lower bound of average life expectancy. A look at the leading causes of preventable death shows that prevention of deaths due to alcohol, smoking and environmental causes beyond suicide could safe more than 200.000 lifes per year! Please pause a while in front of these figures.

In Germany we deplore more than 900.000 deaths each year and according to the statistical office on an average day during the year we have 2100 persons leaving us. In a severe case of influenza these death rates jumped for example in February 2018 to more than 3.100 persons in one day. Hence, keep calm and carry on with taking Covid-19 seriously, but no reason to panic.

Taking a look at our Belgian neighbors, the public health statistics on Belgian Mortality show a cycllical pattern of mortality with peaks in January for the influenza period and sometimes on hot summer days.  

Additionally, there are several severe environmental health hazards which we have gotten used to. Not much fuzz in public about these increased death rates any more. They include many preventable deaths as well. The deadly cocktail of fine particle dust in high traffic countries combined with peaks in temperature and ozone levels yield preventable peaks in death tolls across Europe not just in Belgian, different from region to region and city to city or suburbs or proximity to risky areas. No prove available yet, just coincidence data that need close monitoring. Please follow up on the web page of Epistat and the B-momo project.The EuroMoMo-project and data can be followed on the new webpage, commented by on the 23.4.2020. Late data reporting as accused for UK by the Financial times needs to be followed closely for all countries.

Students should build their statistical methods skill and get ready to use the statistical software R for further analyses useful to produce nice figures and even better advanced analyses.



Health and Care

Some surveys in the social sciences remain a reference due to their interesting scope of questions included. The Canadian National Survey of the Work and Health of Nurses is such a survey since they “dared” to ask a representative sample of 18.000 nurses, health care workers and care assistants questions including medication errors, fall injuries, and complaints of older adults in Canada. The study by Zafar Mehdi, Ramzi Nasser, Hildegard Theobald and myself reveals the importance of further training and sufficient staffing to prevent medication errors, fall injuries and other complaints of patients. DOI: 10.5539/gjhs.v11n3p111

Besides the interesting results of this study based on a little used data set, the study should encourage and reward transparency of medical practices and analyses (relevant in #Covid-19). Hopefully many other studies, ideally with longitudinal designs, will build on this interesting kind of data collection. Evidence-based human resource policies should not stop in front of hospitals and care institutions. Unfortunately, such sensitive data are still rarely collected, although conclusions are helpful for nurses, patients and society as a whole.

The Link to the paper in the Global Journal of Health Sciences and the download is free of charge here.  For science policy it is interesting to notice that the paper was part of a self-financed Ph.D. of Zafar Mehdi, accepted at the University of Vechta recently.