The information below is based on scientific publications


2020-04-04Course of the disease and the spread of the virus

Virus name: SARS-CoV-2
Symptoms name: COVID-19

Course of the disease:

day  1 - Asymptomatic stage.
day  5 - Symptoms start.
day  7 - IgM antibodies appear.
day  9 - IgM antibodies become detectable.
day 14 - Patient begins to recover. IgG antibodies appear.
day 21 - Patient recovers. IgG antibodies provides immunity.
day 28 - IgM antibodies disappear.

Coronavirus COVID-19: Coronavirus COVID-19 Global Cases by CSSE at JHU
Coronavirus COVID-19: WorldoMeters COVID-19 Coronavirus Pandemic
Genomic epidemiology: Genomic Epidemiology of Novel Coronavirus
European Centre for Disease Prevention and Control: Weekly COVID-19 country overview



  • Recommended drug: Paracetamol
  • Temperature activates the immune system, so it is advisable not to use paracetamol (unless the temperature rises above 38.5° C).
  • Paracetamol starts to work after about 30 minutes after consumption.
  • The effect of paracetamol lasts about 4-6 hours.
  • Do not use ibuprofen or aspirin as they slow down the production of antibodies needed to fight the virus (unless your doctor prescribes it).


2020-04-22Publicly available over-the-counter non-prescription medicine

Have medication at home for a couple of weeks ahead so you don't infect others while shopping.

Remember, that preferable way to get all required vitamins and minerals is through healthy diet.

2020-04-22Vitamin C

Vitamin C is an important nutrient that supports the functioning of the immune system.

For prophylactic use during the quarantine period:

  • Adults: 500mg
  • Children: 250mg

The daily dose of vitamin C is about 1 milligram per kilogram of body weight per day.


2020-04-04Vitamin D

Vitamin D supplements protect against acute respiratory infections, including colds and flu.

Consume per day:

  • During the quarantine period: 800-1000 IU
  • In case of suspected contact with the virus carrier: 1000-2000 IU
  • When symptoms worsen: 4000 IU

The daily rate of vitamin D is 400-800 IU per day. 1 IU = 0.025 μg
Studies show that those who used 800 IU (20μg) every day had the best effect on the virus.


2020-04-22N-Acetyl-Cysteine (NAC)

N-Acetyl-Cysteine ​​significantly alleviates influenza-like symptoms and improves cellular immunity.

Consume per day:

  • During the quarantine period: 600 mg
  • In case of suspected contact with the virus carrier: 600 mg twice (morning and evening)

A study of influenza virus-infected patients showed that the symptomatic form developed: 79% of patients in the placebo group, and only 25% of patients treated with NAC.


2020-04-04Zinc and Quercetin

Zinc stops the virus from multiplying inside the cell.

Quercetin (zinc ionophore), helps zinc get inside the cell.

Consume per day - Zinc:

  • During the quarantine period: 25 mg

Consume per day - Quercetin:

  • In case of suspected contact with the virus carrier: 500 mg
  • During symptoms: 500 mg twice (morning and evening)
  • When symptoms worsen: increase to 3 g

The research used from 3g to 7g of Quercetin per day.



A rise in temperature activates the immune system.

Alternative to sauna - Bath:

  • Fill the bath with 39-42 ° C water.
  • Immerse half body for 20-30 minutes (or 10 minutes from the moment face begins to sweat).
  • The point is for half of the body to be in the heat and half in the cold.
  • You can finish with short cold water shower.

Alternative to sauna - Contrast Shower (14 min):

  • 5 minutes of hot water.
  • 1 minute   of cold water.
  • 3 minutes of hot water.
  • 1 minute   of cold water.
  • 3 minutes of hot water.
  • 1 minute   of cold water.



Symptoms occur 2.94 times less often in those who sleep 8 hours or more than in those who sleep 7 hours or less.


Respirators and Filters
Respirators and Filters
Filtering Standards
US Standards
Rating Filters at least % of airborne particles

Not (N) Oil Resistant Particulate Filters

N95  95.00%
N99  99.00%
N100 99.97%

Oil Resistant (R) Particulate Filters

R95  95.00%
R99  99.00%
R100 99.97%

Oil Proof (P) Particulate Filters

P95  95.00%
P99  99.00%
P100 99.97%
EU Standards

Particulate (P) Filters
European standard EN 143

P1   80.00%
P2   94.00%
P3   99.95%

Filtering Facepiece (FFP) Respirators
European standard EN 149
Half Mask Respirators (EU)
Half Facepiece Respirators (US)

FFP1 80.00%
FFP2 94.00%
FFP3 99.00%

Full Face Masks Respirators
European standard EN 136
Full Face Mask Respirators (EU)
Full Facepiece Respirators (US)

Class 1 Light duty work and are low maintenance
Class 2 General duty work, and include maintainable parts
Class 3 Heavy duty use and fire fighters

2020-043M6000 Series Full Face Mask Respirator (EN136: Class 1)€95

EU & US: 3 sizes: 6700-small, 6800-medium, 6900-large

2020-043MFF-400 Series Full Face Mask Respirator (EN136: Class 2)€180

US: 3 sizes: FF-401-small, FF-402-medium, FF-403-large

2020-043M7000 Series Full Face Mask Respirator (7907S - EN136: Class 2)€230

EU: 1 size: 7907S-single size
US: 3 sizes: 7800S-S-small, 7800S-M-medium, 7800S-L-large

The 7907S Full Face Respirator is used with twin lightweight filters which are fitted by a simple bayonet attachment system, providing an economical and flexible choice.

• Flexible system (gas/vapour and/or particulate filters plus Supplied-Air option).
• Soft, pliable hypo-allergenic, facepiece material.
• Dual filter design reduces breathing resistance and improves weight distribution for greater comfort.
• Large, polycarbonate lens.
• Double face sealing gasket ensures a better fit.
• Speech diaphragm improves communication.
• Six strap harness assembly for easy adjustment and a reliable fit.
• Soft compound inner nose-cup increases user comfort.
• Spectacle kit available.

The 7907S Full facepiece can be used with a variety of different filter / product options:

• Gas and vapour filters - The 6000 series filters fit directly onto the 7907S full facepiece.
• Particulate filters - The 2000 series particulate filters fit directly onto the 7907S full facepiece. The 5911/5925/5935 particulate filters may be used on their own with platform 603 & retainer 501.
• A combination of gas / vapour and particulate filters - The 5911 / 5925 / 5935 particulate filters can be used with 6000 series gas / vapour filters using retainer 501.
• Supplied-Air mode using the 3M S-200 Respirator System.


2020-04-04Cleaning and Disinfecting 3M Reusable Respirators

  • Use 7.5L water (+49°C max) + 30ml sodium hypochlorite (household "bleach").
  • Solvents and strong detergents may damage 3M masks and should not be used for cleaning.
  • Do not use cleaners containing lanolin or other oils.
  • Soaking in IPA (Isopropanol / Isopropyl Alcohol) solution resulted in degradation of inhalation valves after ~20 cycles, for 6200 and 7500 facepieces.


2020-04APC PureSodium Hypochlorite 4% (500 ml)€5

Sodium Hypochlorite: 4.0-4.99%

Hazard Class: 8

Packing Group: 3

Hazard Phrases: May be corrosive to metals. Causes severe skin burns and eye damage. Very toxic to aquatic life. Contact with acids liberates toxic gas.

Shelf Life: 3 Years


2020-043M2138 Particulate Filters (P3)€12

2020-043M6038 Particulate Filters (P3)€12

2020-043M2135 Particulate Filters (P3)€10

2020-043M6035 Particulate Filters (P3)€10

6035 particulate filter protects from viruses.

3M 6035 encapsulated P3 R particulate filters are for use with a wide range of 3M full-face and half-face masks (Series 6000/7000/7800/9000) and are easy to click into place thanks to the bayonet connection. They offer respiratory protection against solid and liquid particles, and they’re encapsulated in a robust plastic case for easy cleaning.

• Protects against solid and liquid particulates
• For use with 3M half-face and full-face respirator masks
• Encapsulated in robust plastic case so they can be wiped clean
• Bayonet connection with a simple twist-and-click fitting
• Innovative design allows you to check the seal by a simple squeeze of the filters
• Lightweight with low breathing resistance
• Maximum use concentration for full-face masks: 40 x workplace exposure limit (WEL)
• Maximum use concentration for half-face masks: 20 x workplace exposure limit (WEL)


Filters (Alternative)

2020-043M6055 Organic Vapour Filters (A2)€12

6055 organic vapour filter doesn't protect from viruses. You can use it to attach 5935 particulate filter with 501 filter retainer to mask.  

Replacement filters for spray painting, brush and roller painting
A2 protection against organic gases and vapours such as solvent based paint, adhesive and cleaning detergents*
Use with 3M reusable masks in 6000, 6500 and 7000 series
Provides good field of vision as a result of the unique trapezoidal shape
Lightweight, low breathing resistance, well balanced when fitted to mask
Tested and approved to comply with European standards - CE Mark 0086 (EN 14387:2004+A1:2008 A2)
Users must be trained and have read all user instructions. Misuse may cause injury, severe or life threatening illness
No natural rubber latex components
Compatible with 3M Eyewear and Hearing Protection

2020-043M5935 Particulate Filters (P3)€6

5935 particulate filter protects from viruses.

Replacement filters for use in combination with 3M gas and vapour filters
P3 protection against high level fine dusts and oil or water based mists*
Use with 3M reusable masks in 6000, 6500 and 7000 series
Suitable for trade orbital or manual sanding or when there is a need for combination gas, vapour and particulate protection such as paint spraying. To be used on 6000 series 3M filter cartridges in combination with 501 filter holder
Tested and approved to comply with European standards - CE Mark 0086 (EN 143:2000 P3 R)
Users must be trained and have read all user instructions. Misuse may cause injury, severe or life threatening illness
No natural rubber latex components
Compatible with 3M Eyewear and Hearing Protection

2020-043M501 Filter Retainer€5

Designed to hold 3M Particulate Filter 5N11 and 5P71/07194 (AAD) (sold separately)
Component works with 3M Respirator 5000 Series, 3M Cartridges 6000 Series and 3M™ Filter Adapter 603
Color: Translucent white
Measures 4” high x 8.5” long x 4.5” wide
Refer to the Filter/Cartridge User Instructions for further information.
Used to hold 3M™ Particulate Filters 5N11 and 5P71/07194(AAD) in place on top of 3M™ Respirators 5000 Series and 3M™ Cartridges 6000 Series and 3M™ Filter Adapter 603.

The 3M™ Filter Retainer 501, Respiratory Protection System Component holds 3M™ Particulate Filters 5N11 and 5P71/07194 (AAD) in place on top of 3M™ Respirators 5000 Series, 3M™ Cartridges 6000 Series and 3M™ Filter Adapter 603 (all respirators, filters, cartridges, and adapters sold separately).

Disinfecting and reusing Filters

Some masks and filters can be disinfected without reducing the filtration efficiency of the meltblown layer. Two best methods found:

  1. 75°C Hot Air for 30 mins. Mask can be reused 20 times.
  2. UV (254 nm, 8W) for 30 min. Mask can be reused 10 times.

Disinfecting masks by using steam, 75% alcohol or chlorine-based solution will reduce filter efficiency and is not recommended.


2020-04-04Lifespan of COVID-19 Virus on Surfaces



Gripo ir COVID-19 mirtingumo palyginimas: Flu vs COVID-19 Death Rate by Age

COVID-19 mirtingumas pagal amžių, lytį ir svorį: [PDF] ICNARC COVID-19 Report