Travel for Life

Ending the pandemic crisis won’t be quick or easy. Vaccines may initially slow deaths among those with chronic conditions. But the logistical, production and public education challenges of immunizing 60% to 70% of national populations -- the level the World Health Organization says is needed to achieve herd immunity -- will be a time-consuming and troublesome process. The world will still need masks, social distancing, widespread testing and effective new therapies to keep the virus at bay, public-health specialists say. Current Vaccine Candidates in US C ompany / Candidate Current Clinical Trial Phase Number of Doses Likely Needed for Full Course Notes AstraZeneca AZD1222 Adenovirus-vector vaccine Phase 3 2 doses , injected Supports advanced clinical studies, vaccine manufacturing technology transfer, process developm...

When innate immunity, the initial defense against infection, is working properly — as it does in most people infected with Sars-Cov-2 who develop mild or no symptoms of disease — the second stage, adaptive immunity, kicks in after a few days.   Warning: even mild Covid-19 infections can make people sick for months. [14] Figure 1.  Innate immunity vs Adaptive immunity  Adaptive response The nature of acquired immune responses following natural infection varies substantially among pathogens: [11] Measles (1) or smallpox (2) virus Results in lifelong protection from the re-acquisition and re-transmission of secondary infections Influenza (3), respiratory syncytial virus (RSV) (4) Confer imperfect or transient clinical and transmission-blocking immunity either via pathogen evolution or waning immunological memory Dengue (5) or a vaccine (e.g., RSV (6)) Could result in more clinically severe secondary infections due to a phenomena  known as antibody-depend...

Figure 1 Vaccines, PAMPs , and Adjuvants [10] What is Vaccine? A vaccine   Is a biological preparation that provides active acquired immunity to a particular infectious disease Can be  prophylactic  or  therapeutic Prophylactic Prevent or ameliorate the effects of a future infection  by a natural or "wild" pathogen Therapeutic   Fight a disease that has already occurred, such as  cancer Contains an agent that Stimulates the body's immune system  to recognize the agent as a threat, destroy it , and to further recognize and destroy any of the microorganisms associated with that agent that it may encounter in the future.  Is often made from weakened or killed forms of the microbe, its toxins , or one of its surface proteins . Virus Vaccine Types In this article, we will focus on virus vaccines only.  Its various vaccine types include (see Figure 1): Live attenuated virus Whole killed virus Split virus Subunit vaccine Virus...

Loch Lomond  is a well-known traditional Scottish song first published in 1841.  Its sweet lyrics also hide a dark story, one that's been interpreted in a variety of ways through the centuries. The song prominently features Loch Lomond, the largest Scottish loch, located between the council areas of West Dunbartonshire, Stirling and Argyll and Bute. The Dark Story The dark story goes like this: [2] This song is connected with the Jacobite Rebellion in Scotland and their earnest desire to return bonnie Prince Charlie as Scottish king. And the last serious battle of the war between Scotland and England was fought on the field of Culloden. And after the Battle of Culloden , a great number of ringleaders of the Scottish rebellions and what the Scots referred to as the young, brave laddie heroes, were taken to London for a series of show trials. Whilst they were waiting for their trials, many members of their families came from Scotland down to London. And it is quite certa...

Most people with Covid-19 recover within two weeks. Some, as reported in [30], with so-called Long Covid (symptoms lasting longer than three weeks), continue to experience excessive fatigue, breathlessness, headache, insomnia, muscle fatigue and pains, chest pains, persistent cough, intermittentfevers and brain fog. It’s unclear why some people develop long Covid and others don’t, but four factors appear to increase the risk : [37] High levels of viral RNA early during an infection The presence of certain autoantibodies  The reactivation of Epstein-Barr virus   Having Type 2 diabetes The study finds about 10 per cent had symptoms for a month , with between 1.5 and 2 per cent after three months . The median age of those with Long Covid is 45 , and women are more likely to be affected . COVID-19 Symptoms Linger for Months for Many Months after becoming ill, many COVID-19 patients still have symptoms, three studies confirm, and the more severe the initial infections, th...