The concern that SARS-CoV-2 could be spread by people without symptoms originally came from a single case report. It was alleged that an asymptomatic woman from China had spread the virus to 16 other contacts in Germany. Later reports showed that, at the time of contact, this woman was taking medication for flu-like symptoms, invalidating the evidence provided for the theory of asymptomatic transmission. As with other common respiratory viruses, SARS-CoV-2 spreads by being exhaled, coughed or sneezed into the air. The largest droplets fall quickly and settle on the ground whilst the most lightweight particles, known as aerosols, may remain suspended in the air for days. Once the virus is present in the environment, it spreads by finding its way into the respiratory tract of new hosts in a large enough quantity (known as the ‘viral load’ or ‘infectious dose’) to infect them. The theory of fomite transmission (touching contaminated surfaces and then touching the face) is not supported by scientific evidence.
…In asymptomatic individuals, the viral load is typically very low and the infectious period is also short in duration. They may still exhale virus particles, which another person may encounter. However, the overall likelihood of transmitting the disease to others is negligible. Thus asymptomatic cases are not the major drivers of epidemics. As Dr Anthony Fauci of the US National Institute of Allergy and Infectious Diseases stated in March 2020: ‘In all the history of respiratory-borne viruses of any type, asymptomatic transmission has never been the driver of outbreaks. The driver of outbreaks is always a symptomatic person.’
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The main purpose of science is to question and attack. To subject ideas to the greatest scrutiny. Those who decide to shut down and stifle debate – whatever they may believe themselves to be doing – are, in fact, traitors to the cause of science. Stranglers of the enlightenment, assassins of progress.
They are not alone, and things have gotten far worse in the past year or so. Science has taken a terrible battering during Covid-19, though I have always known that dissent against a widely held scientific hypothesis is difficult.
Dr. Hodkinson, here to discuss the dangers of the COVID-19 vaccines, the possibility of infertility, and the very real concerns about the vaccine-induced spike proteins and what new scientific research is clearly suggesting about their risks to your health.
Unlocked Exclusive — in a hard-hitting interview, retired NHS pathologist Dr John Lee discusses the government’s response to the pandemic, analyses why proven scientific procedures were abandoned, makes the case for ending Lockdown now, and asks the question most doctors are unable to discuss in public. Covid-19: is the cure worse than the disease?
Airborne simulation experiments showed that cotton masks, surgical masks, and N95 masks provide some protection from the transmission of infective SARS-CoV-2 droplets/aerosols; however, medical masks (surgical masks and even N95 masks) could not completely block the transmission of virus droplets/aerosols even when sealed.
A curated list of mask facts and medical publications.
COVID-19 is as politically-charged as it is infectious. Early in the COVID-19 pandemic, the WHO, the CDC and NIH’s Dr. Anthony Fauci discouraged wearing masks as not useful for non-health care workers. Now they recommend wearing cloth face coverings in public settings where other social distancing measures are hard to do (e.g., grocery stores and pharmacies). The recommendation was published without a single scientific paper or other information provided to support that cloth masks actually provide any respiratory protection. Let’s look at the data.
- Surgical masks are loose fitting. They are designed to protect the patient from the doctors’ respiratory droplets. There wearer is not protected from others’ airborne particles.
- People do not wear masks properly. Many people have the mask under the nose. The wearer does not have glasses on and the eyes are a portal of entry. If the virus lands on the conjunctiva, tears will wash it into the nasopharynx.
- Most studies cannot separate out hand hygiene.
- The designer masks and scarves offer minimal protection. They give a false sense of security to both the wearer and those around the wearer.
**Not to mention they add a perverse lightheartedness to the situation.
- If you are walking alone, no need for a mask. Avoid other folks; use common sense.
- Remember: children under 2 years should not wear masks because of accidental suffocation and difficulty breathing in some.
- Even if a universal mask mandate were imposed, several studies noted that folks do not use the mask properly and over-report their wearing. Additionally, how would the mandate be enforced??
- The positive studies are models that assume universality and full compliance.
- If wearing a mask makes people go out and get Vitamin D – go for it. In the 1918 flu pandemic people who went outside did better. Early reports are showing people with COVID-19 with low Vitamin D do worse than those with normal levels. Perhaps that is why shut-ins do so poorly.
We noticed that speaking through some masks (particularly the neck gaiter) seemed to disperse the largest droplets into a multitude of smaller droplets (see fig. S5), which explains the apparent increase in droplet count relative to no mask in that case. Considering that smaller particles are airborne longer than large droplets (larger droplets sink faster), the use of such a mask might be counterproductive. Furthermore, the performance of the valved N95 mask is likely affected by the exhalation valve, which opens for strong outwards airflow. While the valve does not compromise the protection of the wearer, it can decrease the protection of persons surrounding the wearer. In comparison, the performance of the fitted, non-valved N95 mask was far superior.
Note: Coughing and large droplets are note the issue beause breathing exhales more virus in fine aerosols than coughing. Finer aerosols bypass masks and nose to the lungs. Since masks nebulise particles, the solution is ventilation, not face masks.
The global pandemic of COVID-19, caused by severe acute respiratory syndrome coronavirus 2 [SARS-CoV-2]) has been associated with infections and deaths among health-care workers. There have been conflicting recommendations from health authorities on the use of masks or respirators to protect health-care workers. When I first reviewed personal respiratory protection against tuberculosis for health-care workers more than 20 years ago, there was very little information on infectious aerosols. Since then, colleagues in various disciplines have provided a wealth of data. The purpose of this Viewpoint is to review the scientific literature on the aerosols generated by individuals with respiratory infections, and to discuss how these data inform the optimal use of masks, respirators, and other infection-control measures to protect health-care workers from those aerosols. This is not a review of the literature on the use of surgical masks or respirators, as several have been done already.