Search Results for coronavirus

Contrary to claim in viral Facebook post, the flu vaccine does work and certain types of cancers can be cured

The flu vaccine helps to reduce the incidence and severity of influenza, although its effectiveness varies between seasons depending on the selection of the flu vaccine virus strains. Cancer is a complex family of diseases for which multiple forms of treatment are available, although the success of such treatments can vary significantly, depending on factors like the type and stage of the cancer. There are a proportion of cancer patients who have achieved complete remission after treatment and remain cancer-free for the rest of their lives, who are thereby considered to be cured. And while there is much we do not know about COVID-19, our prior knowledge of how vaccines work is sufficient to allow us to develop a potential vaccine against the disease.

Hydroxychloroquine, alone or in combination with azithromycin, found ineffective for treating COVID-19 in large clinical trials

Large-scale clinical trials demonstrate no beneficial effect of hydroxychloroquine in terms of viral shedding, disease severity, or mortality among COVID-19 patients. However, numerous ongoing clinical trials are still evaluating the potential use of hydroxychloroquine to prevent infection in people with a high risk of exposure to COVID-19. Public health institutions caution against unsupervised use of the drug, as it may increase the risk of cardiac toxicity in people with underlying medical conditions.

Wearing masks aims at slowing SARS-CoV-2 circulation, not protecting against a certain death

In order to limit and eventually stop an ongoing epidemic, it is necessary to reduce virus transmission. Wearing face masks has been shown to be effective at slowing the circulation of respiratory viruses such as SARS-CoV-2. Some individuals who do not wear masks may still remain healthy because exposure to SARS-CoV-2 does not automatically lead to infection or death. In addition, the use of masks by others within the community can also limit virus transmission, thereby protecting those who do not wear masks, similar to the herd immunity effect

Health authorities encourage the general public to wear face masks to reduce COVID-19 transmission

Health authorities like the World Health Organization and the U.S. Centers for Disease Control and Prevention now recommend that the public use face masks in shared spaces, like public transportation and grocery stores. This change in guidance occurred after several studies found that infected individuals can transmit COVID-19 even when not showing symptoms. Contrary to many viral claims, face masks do not cause oxygen deficiency or a toxic buildup of carbon dioxide. It is important to remember that cloth face masks, surgical masks, and even N95 respirators do not provide 100% protection from the novel coronavirus and therefore must be combined with other transmission control measures such as physical distancing and good hand hygiene.

Still no evidence that hydroxychloroquine can cure or prevent COVID-19

Current scientific evidence does not support the use of hydroxychloroquine to prevent or cure COVID-19. In contrast to some small early studies showing an increased recovery rate among patients treated with hydroxychloroquine, more recent large and well-designed clinical trials showed no such improvement when the drug was used alone or in combination with zinc or azithromycin. In the absence of a proven cure for COVID-19, physical distancing, good hand hygiene, and the use of masks are effective measures for reducing the transmission of the disease.

Baseless speculations underpin a retracted editorial claiming spontaneous generation of SARS-CoV-2 in skin cells exposed to 5G waves

The proposed mechanism of action described in the claim that 5G millimeter waves can generate SARS-CoV-2 in human cells violates fundamental principles of biology. Scientific evidence does not support a causal relationship between 5G and COVID-19. Many of the regions with the highest COVID-19 infection rates, such as Brazil, do not have 5G coverage, providing further evidence that 5G is not associated with the pandemic.

Sexual transmission of SARS-CoV-2 currently unconfirmed as studies produce conflicting evidence of its presence in the reproductive system

COVID-19 transmission occurs primarily through contact with respiratory droplets produced by infected individuals, but the detection of the SARS-CoV-2 virus in body fluids such as semen has raised questions about alternative modes of transmission. Potential sexual transmission of the disease would necessitate amending current prevention protocols, so several studies have investigated whether the virus is present in the reproductive system. However, small sample sizes and poor study designs have produced contradictory results that do not provide sufficient evidence for determining whether infectious virus is present in the genitourinary tract and also what effects it might have on reproduction.

A trypsin-based oral spray reportedly deactivates SARS-CoV-2 in a liquid suspension but has not yet been tested in the mouth

Some studies suggest that trypsin-containing solutions may speed wound healing and can deactivate certain viruses in vitro, but only a few clinical studies have tested such solutions in humans. These studies demonstrate mild improvement of common cold symptoms caused by different coronaviruses. However, the mechanism of action of the sprays is still unclear and no in vivo data is available to support the hypothesis that trypsin-based sprays might also work against SARS-CoV-2 as implied in the video.

Scientific evidence supports the use of face masks for reducing the transmission of respiratory diseases including COVID-19

Face masks are safe to use and are not associated with oxygen deficiency. Although more research is needed to better establish the efficacy of face masks in reducing disease transmission and the mechanisms behind their efficacy, a growing evidence base indicates that face masks have a beneficial effect in reducing the spread of respiratory diseases like COVID-19. However, masks do not provide 100% protection and must also be combined with other transmission control measures such as physical distancing and good hand hygiene.

Primary COVID-19 transmission is by close contact with infected people; nasopharyngeal swab-based testing provides the highest diagnostic accuracy

Respiratory droplets are considered the main mode of COVID-19 transmission, which can be prevented by protective measures, including physical distancing, good ventilation, and the use of face masks. In parallel, diagnostic testing to identify and isolate infected individuals and their close contacts is a key strategy to slow the spreading of the disease. While alternative methods are under study, nasopharyngeal swab-based RT-PCR testing remains the most accurate and the gold standard method for COVID-19 diagnosis.