Covid-19: When will we reach herd immunity? Here are 3 reasons that's a hard question to answer

Different diseases have different thresholds for herd immunity. For measles, for example, the herd immunity threshold is 92%-94%. Estimates for COVID-19 have varied, with some putting it at 85% or higher. However, many hesitate to give a single number. Here are three reasons why.
Source: The Economic Times - Category: Consumer Health News Source Type: news

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Vaccine. 2021 Dec 24:S0264-410X(21)01630-3. doi: 10.1016/j.vaccine.2021.12.022. Online ahead of print.ABSTRACTThe COVID-19 pandemic disrupted routine vaccinations for children and adolescents. However, it remains unclear whether the impact has been different for children and adolescents from low-income families. To address this, we compared monthly routine vaccination use per 1000 vaccine-eligible children and adolescents enrolled in Louisiana Medicaid in the years before (2017-2019) and during the COVID-19 pandemic (2020). Compared to the 2017-2019 average vaccination rates, we found a 28% reduction in measles, mumps, and...
Source: Vaccine - Category: Allergy & Immunology Authors: Source Type: research
Mark Sumner at DK has aroundup of news from overwhelmed health care systems around the country. This seems to be getting very little attention from national media, for some reason -- this is a list of local stories, which don't seem to have gotten the attention of editors at CNN or the New York Times.This is definitely bad news in the present, but it's better news in the long run. The Covid-19 variant that's causing this is extremely contagious -- as contagious a measles, apparently. That means you can become infected just by briefly being in the vicinity of an infectious person. One thing that's really unpleasant about th...
Source: Stayin' Alive - Category: American Health Source Type: blogs
Guillain–Barre syndrome (GBS), the most frequent cause of acute paralytic neuropathy, is an inflammatory polyneuropathy that is autoimmune in nature. Many infectious agents such as Campylobacter jejuni (the most commonly identified bacteria associated with GBS), cytomegalovirus, Epstein–Barr virus, measles virus, influenza A virus, and Mycoplasma pneumonia, as well as enterovirus D68 and Zika virus and noninfectious agents such as vaccines and surgeries have been reported to trigger GBS. Three main variants of GBS include the classic acute inflammatory demyelinating polyneuropathy (AIDP), which is the most comm...
Source: Reviews in Medical Microbiology - Category: Microbiology Tags: FOCUS ON COVID-19 Source Type: research
Conclusion: The current study provided a list of African medicinal plants which demonstrated antiviral activities and could potentially be candidates for COVID-19 treatment. However, all studies were preliminary and in vitro screening. Further in vivo studies are required for plant-based management of viral diseases.
Source: Frontiers in Pharmacology - Category: Drugs & Pharmacology Source Type: research
Biomed Res Int. 2021 Dec 14;2021:6995096. doi: 10.1155/2021/6995096. eCollection 2021.ABSTRACTAt the beginning of the COVID-19 pandemic, early modelling studies estimated a reduction in childhood vaccinations in low- and middle-income countries. Regular provision of both curative and preventive services such as antenatal care and childhood immunizations has been negatively affected since the onset of the pandemic. Our study was aimed at examining the impact that the pandemic had on childhood vaccination services at the Tamale Teaching Hospital (TTH). A mixed methods study design was employed for the study, which was conduc...
Source: Biomed Res - Category: Research Authors: Source Type: research
The Health Ministry told the Lok Sabha last week that the National Expert Group on Vaccine Administration for COVID-19 (NEGVAC) and the National Technical Advisory Group on Immunisation (NTAGI) are considering scientific evidence related to justification for booster doses against the coronavirus. Noted virologist Dr T Jacob John said booster doses of any vaccine (except live attenuated like OPV, measles) exponentially raises antibody level: "Pfizer vaccine some 40-fold high".
Source: The Economic Times - Category: Consumer Health News Source Type: news
Due to the social isolation measures adopted in an attempt to mitigate the risk of transmission of SARS-CoV-2, there has been a reduction in vaccination coverage of children and adolescents in several countrie...
Source: BMC Infectious Diseases - Category: Infectious Diseases Authors: Tags: Research Source Type: research
Vaccine. 2021 Nov 27:S0264-410X(21)01539-5. doi: 10.1016/j.vaccine.2021.11.066. Online ahead of print.ABSTRACTWe retrieved data on 8940 anaphylaxis cases post-COVID-19 vaccination from the US Vaccine Adverse Event Reporting System and the European EudraVigilance from week 52/2020 through week 31/2021 and compared them with those of other vaccines. Overall, 837,830,000 COVID-19 vaccine doses were delivered in the US and Europe during the study period, for which the vaccine name was known. The mean anaphylaxis rate was estimated at 10.67 cases per 106 doses of COVID-19 vaccines (range: 7.99-19.39 cases per 106 doses dependin...
Source: Vaccine - Category: Allergy & Immunology Authors: Source Type: research
Expert Rev Anti Infect Ther. 2021 Dec 2. doi: 10.1080/14787210.2022.2013808. Online ahead of print.ABSTRACTINTRODUCTION: In solid organ transplant (SOT) recipients, viral infections are associated with direct morbidity and mortality and may influence long-term allograft outcomes. Prevention of viral infections by vaccination, antiviral prophylaxis, and behavioral measures is therefore of paramount importance.AREAS COVERED: We searched Pubmed to select publications to review current preventive strategies against the most important viral infections in SOT recipients, including SARS-CoV-2, influenza, CMV and other herpesvirus...
Source: Expert Review of Anti-Infective Therapy - Category: Infectious Diseases Authors: Source Type: research
Ann Med. 2021 Dec;53(1):2286-2297. doi: 10.1080/07853890.2021.2009128.ABSTRACTThe current COVID-19 global pandemic continues to impact healthcare services beyond those directly related to the management of SARS-CoV-2 transmission and disease. We reviewed the published literature to assess the pandemic impact on existing global immunization activities and how the impact may be addressed. Widespread global disruption in routine childhood immunization has impacted a majority of regions and countries, especially in the initial pandemic phases. While data indicate subsequent recovery in immunization rates, a substantial number ...
Source: Annals of Medicine - Category: Internal Medicine Authors: Source Type: research
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